4 coins
There are 4 coins on the table. They must be moved from the first position to the second, and the place in the middle must exactly correspond to one coin. When moving coins, you cannot tear them off the table, and you can only move one coin towards two or three others. In this and the following tasks, it is prohibited to use measuring instruments - ruler, compass, etc. All measurements are made using coins only.
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Flower
A flower is made from 7 coins. It is necessary to remove a coin from the center of the flower in a minimum number of movements without changing its shape and without tearing the coins off the table.
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Triangle
Move the 3 coins in such a way as to turn the triangle upside down.
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Parallelogram
In a minimum number of moves, turn a parallelogram into a triangle.
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Hexagon
In the minimum number of moves, turn the hexagon into a triangle.
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Two extra coins
In a minimum number of movements, remove 2 coins from the center without changing the shape of the figure and without tearing the coins off the table.
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Three coins in a triangle
In the minimum number of movements, remove 3 coins from the center without changing the shape of the figure and without tearing the coins off the table.
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Five coins
Place 5 coins in two rows of 3 coins each.
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Six coins
Place 6 coins in two rows of 4 coins each.
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Six coins-2
In the figure, 5 coins are arranged so that you can find only two segments with 3 coins on each. The task is to add just one coin and get four segments of three coins each. It is prohibited to stack coins on top of each other.
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Eight coins
Rearrange one coin to create two rows of 5 coins each.
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twelve coins
Place 12 coins in seven rows of 4 coins each.
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Ten coins
Place 10 coins in four rows of 4 coins each.
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4x4
There are sixteen coins on the table - four rows of four coins each. Remove six coins so that there are an even number of coins left in each row and column.
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10x5
Place 10 coins in five rows of 4 coins each. It is prohibited to stack coins on top of each other.
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12x6
Place 12 coins in six rows of 4 coins each. It is prohibited to stack coins on top of each other.
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Rhombus
There are 2 coins of 1 ruble, 2 of 2 rubles and 2 of 10 rubles. Place all six coins in a diamond shape so that coins of the same denomination are not touching each other.
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Perimeter of a triangle
There are 5 coins of 1 ruble and 5 of 2 rubles. Place all ten coins in the shape of a triangle so that the sum of the numbers on each of its three sides is the same.
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Move 8 coins
There are 8 coins (4 coins of 1 ruble and 4 coins of 2 ruble). All coins are placed in one row. Moving two adjacent coins in one move, in 4 moves make sure that the one-ruble and two-ruble coins alternate.
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Move 6 coins
There are 6 coins (2 coins of 1 ruble, 2 of 2 rubles and 2 of 10 rubles). All coins are placed in one row. Moving two adjacent coins in one move, in 3 moves do as shown in the figure below.
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Coin square
There are 8 coins in a 3x3 square along the perimeter (4 coins of 1 ruble each and 4 coins of 2 ruble each). Using the free square in the center, swap the one-ruble and two-ruble coins. In one move, you are allowed to move one coin to a free adjacent cell horizontally or vertically. It is forbidden to place more than one coin in one cell, jump over cells and go beyond the square.
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Corners
Swap one-ruble coins and two-ruble coins, using the free square in the center. In one move, you are allowed to move one coin to a free adjacent cell horizontally or vertically. You can jump over one cell with a coin horizontally or vertically. It is forbidden to place more than one coin in one cell, and to go beyond the boundaries of the figure.
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Five eagles
By turning over three coins lying side by side each time, you will get 5 coins lying heads up.
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Seven eagles
By turning over three coins lying side by side each time, you will get 7 coins lying heads up.
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Triangle of eagles
Each time you turn over three coins lying in one row, make sure that all the coins are heads up.
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Eagles in a circle
Eight coins lie in a circle. Each time you turn over two coins lying in one row, make sure that all the coins are heads up.
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Square of Eagles
Eight coins lie around the perimeter of the square. Each time you turn over three coins lying on any of its sides, make sure that all the coins are heads up.
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Coins on the table (ingenuity puzzle)
There are two coins on the table - 1 ruble and 2 rubles. How to put 1 ruble coin under a 2 ruble coin, if the 2 ruble coin absolutely cannot be touched or moved from its place.
Place 1 ruble on the floor under the place
where there are 2 rubles on the table.
Hole
Cut a round hole in a piece of paper slightly smaller than a two-ruble coin. Now try to insert a five-ruble coin into it! It is forbidden to tear or tear the paper; manipulating the coin (bending, sharpening, etc.) is also prohibited.
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Roundabout Circulation
Place a 5 ruble coin on the table. After this, place the second 5 ruble coin nearby and roll it (without sliding) around the first coin. If the second five rubles rolled one full revolution, then how many revolutions did it make around its axis?
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Most likely, you will get one turn - you will not be able to avoid
slipping. But if it were not there, there would be two revolutions!
Coins on a glass
Take 2 regular coins and one glass. Now place these coins on the edges of the glass. Now try to lift it from the glass onto the table with two fingers of one hand, but you cannot touch the glass. How to do it.
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Place the thumb and forefinger of one hand on both coins and, pressing them against the outer walls of the glass, carefully slide down until you reach the middle of the glass. Now, with a quick movement, tear the coins away from the glass.
Jumping
Place eight coins in a row on the table as shown in the picture, and then try to rebuild the row into four stacks of two coins in four moves (moving the coin). Another condition: on each turn, the coin must “jump” over exactly two coins (in any direction) and land on the nearest single coin. It does not matter whether the coins being jumped over lie next to each other or on top of each other.
Three in a row
There are twelve coins on the table. The coins lie in four rows of three coins. The coins alternate, some are heads up, and some are tails. Your task is to touch only one coin and move it so that in all horizontal rows the coins are either heads or tails up. In this case, the coins should remain in the same shape. Throwing coins off the table is also prohibited.
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Using your finger, move the middle coin of the top row up and to the left. Without lifting your finger from the coin, move it down, going around the left column of coins until it is under the middle coin of the bottom row. Use this coin to push the middle column up until you again have four rows of three identical coins in each. The problem is solved, and all this time you have only touched one coin.
Archaeologist
An archaeologist has found an ancient coin marked 10 BC. He immediately realized that it was a fake. Why?
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Designation "BC" could have appeared only after the advent of our era.
Checkers with coins
There is a field of 5x5 cells. Each coin can jump over any other coin horizontally or vertically. A coin over which another coin has jumped is removed from the field. How to remove all coins except one, which should remain in the center of the field?
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9 coins
The picture below shows how you can arrange 16 coins with 4 coins in each of 10 rows (4 vertical, 4 horizontal and 2 diagonal). How can you arrange 9 coins in 10 rows of 3 coins in each row?
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Square from triangle
In the picture, a triangle is laid out from coins. How do you move just two coins to get a square?
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Changelings
9 coins lie on the table in the shape of a square. Some of them are heads up, some are tails up. In one move, the coin turns over to the other side, as well as all the coins in contact with it horizontally and vertically. Examples of moves are shown below. Try to turn all the coins heads up in 3 moves.
Hello, dear readers! In our technological age, new products, toys, and electronic devices appear every day. More recently, a new spinner toy has become popular in Russia. The toy has become popular among schoolchildren and teenagers. Let's find out today what a spinner is, where to buy it and how to make it yourself.
Spinner: what is it?
First, let's define a toy and consider: a spinner - what it is and what it is needed for. The object consists of three rounded blades held together by a metal or ceramic bearing. There are weights on each side. The toy has other names: fidget spinner, fidget spinner, skewer, spinner and others.
A little history
The spinner was invented back in the 1990s, but only today has it gained widespread popularity. The invention is credited to American chemist Katherine Hattinger. In Israel, she saw boys throwing stones at other people and thought about making them less aggressive.
According to another version, she created a toy for her seriously ill daughter, who suffered from an autoimmune disease that causes pathological muscle fatigue. The first hand spinner was made from newspaper and tape. I liked the toy so much that Katherine began making even more copies of the spinner and sending them to customers.
In 1993, she patented the invention and released plastic toys, but they were not successful. The patent expired in 2005.
In 2016, Forbes magazine named the fidget spinner a must-have hand toy for the office. It relieves stress well and helps you concentrate.
Tricks with a figner
Already in March 2017, videos began to appear on social networks showing tricks with a figner. The toy is very easy to use. The central bearing of the hand spinner is grasped with the index finger. Beginners can simply twist the fidget. Advanced users move the spinner from finger to finger and perform more complex tricks.
The basis of all tricks with the product is tossing it from hand to hand without stopping. The next level of skill is throwing it behind your back or over your leg. It is important that the fidget does not stop or reduce speed.
You can throw the toy in the air and catch it with one hand or the other, spin it horizontally or vertically. This is probably where the leading types of tricks end. All that you were able to see were just variations of the described actions. The video shows what you can do with this thing:
Why do you need a spinner? First of all, to combat nervous situations. But today it is increasingly becoming a method of demonstrating sleight of hand. The toy develops fine motor skills, so it is useful for people who have problems with this. The main thing is not to overdo it with training.
Where to buy a spinner?
It is not possible to purchase a toy in a regular store. For now, the item is sold in online stores. Sometimes on message boards you can find offers for the resale of used spinners.
But if you want a new toy, you can buy it in one of the largest online stores - Aliexpress. They even sell a glowing spinner that will become your distinctive sign. The price of the item starts from 600 rubles (plastic models) and above.
The cheapest spinner hovers around this cost and can only be made of plastic or wood. If you want a metal thing, you will have to pay more than a thousand rubles.
When deciding which store to purchase a spinner from, carefully study how much a similar product costs in other stores. If you want to buy a quality item inexpensively, be sure to analyze the offers offered by online stores. There are quite a lot of them, so it will be easy to find the optimal one.
Here are some offers that may interest you:
- Aliexpress - very large selection, affordable price, but wait a little longer than ordering in your country
- in the cool Gyrotown store you will find interesting models of spinners with delivery throughout Russia (price from 490 rubles and above)
How to make a spinner with your own hands?
If you don’t have the money to purchase a new fidger, but still want to have a toy, make it yourself at home. If you think it's difficult, you're wrong. We will present you with a detailed drawing for making the item, and video tutorials will be additional help.
Wood product
The most durable and simplest option is made of wood. For production you will need:
- a piece of plywood 6 mm thick;
- jigsaw;
- bearings with a diameter of 20 and 22 mm;
- coins of 50 kopecks;
- Super glue;
- solvent;
- sandpaper;
- gouache paint and a brush for painting (if you are not interested in the color of the product, you can do without paint).
Operating procedure:
- We apply the spinner pattern to the plywood.
- We cut along the contour and cut holes inside for the bearings.
- Treat the bearing with solvent so that it rotates well.
- We insert the bearing into the central hole so that it fits exactly into the slot.
- Glue the coins with superglue into small piles of 5 pieces.
- Sand the spinner with sandpaper, just remove the bearing first.
- Insert the bearing into the product.
- To make the spinner spin well, insert glued coins into the remaining holes.
- The toy is ready. In this form it will spin for 1.5 minutes.
Here is a detailed video of this process:
Now let's solve the problem easier and make a bearing out of paper. To make this you will need a small square sheet of paper. Next we proceed like this:
- Fold a sheet of paper in half.
- Unroll and fold in half again with the other side.
- Unfold and fold to form a triangle.
- We do the same on the other side.
- Fold side to side again.
- We bend the resulting triangle inward on one side.
- The result is a parallelepiped that can be placed on two legs.
- Let's make a few more of these.
- We insert one workpiece into the other, bending the remaining ends in the original part inward.
- We insert more blanks one into another until a circle is formed.
- We move the blanks inside the circle so as to eliminate the hole inside.
The spinner without bearing is ready. It spins quite quickly and can easily replace a wooden or metal one.
Lids product
An excellent spinner is made from caps. To make it, take three plastic bottle caps and superglue.
- First glue the two lids together. Pour a little salt onto the attachment point (salt is needed to make it stick faster) and again apply a layer of glue. We repeat this again.
- Glue another cover in a row.
- Use a hot awl to make a hole in the central lid.
- Take the core of a ballpoint pen and cut off a small part from it.
- We insert the rod blank into the hole, and the spinner is ready.
Here's a video:
If desired, you can add another side cover, then the product will be as similar as possible to a real fidget.
Lego toy
A Lego toy is perfect for children. It can be made with or without a bearing. Let's try the first option: it is more popular and preferable. The following parts will be required:
- a rectangle with holes: there should be seven of them;
- stick with limiters;
- two small round pieces with holes;
- four small rectangles;
- eight quarter circles or large rectangles for the blades.
Let's start making:
- We place the stick in a rectangle with holes in the middle and secure it with stops.
- On top of them on both sides we string round parts with holes.
- Using the holes in the rectangle, we secure quarter circles or rectangles on four sides.
- We insert small rectangles on top of them, closer to the center.
- Place the remaining quarter circles or rectangles on the top layer.
Here are detailed photos of the process: 
Such a product without a bearing will not balance on your finger without moving. But if you twist it, it works no worse than a regular fidget.
The simplest one is made from paper
This is the simplest version of the fidget; children and their parents can make it in five minutes. I won’t even describe it, I’ll just show pictures and you’ll understand everything. 
Which bearing to choose?
At your discretion, you can make a toy from any material. If you decide to choose a model with a bearing, it is worth deciding what bearings are needed for the spinner. Traditionally, DIYers choose a part with a diameter of at least 20 mm and no more than 30 mm.
The standard size of purchased bearings is 22 mm. However, practice has shown that the optimal diameter is still considered 25-27 mm. Try experimenting and find the best size for you.
The middle of the product is made from the bearing. It has a suitable shape and is excellent for starting rotation. The bearing can also be used as a weighting agent for the blades. Try to keep all the parts on the sides the same size, otherwise the blades simply won’t spin.
The fidget spinner is a popular stress reliever. Still, be careful with him. A toy can also become a bad habit, and it will be difficult to unlearn it.
If you try to record how much time a schoolchild spends in his hands with a smartphone, you may turn gray. You cannot take away your cell phone - the child must always be in touch for his own safety, and it is also impossible to control the time - parents are not always with their children. But it seems that a contraption has appeared that can pull modern children out of virtual reality.
The other day, showman Ivan Urgant appeared on television with a strange thing in his hands and said that the spinner (that’s what this thing is called) is at this stage a symbol of childhood. We decided to tell our readers what a spinner is and why it is so necessary for modern children.
So, let’s say right away that there is no SPECIAL meaning that adults are looking for in this toy. Three rings, and in the middle there is a bearing. The spinet rotates around its own axis. Spins for a very long time. You spin and have fun. ALL!
After the appearance of this toy on the Internet, a stir immediately arose - from rave reviews to perplexed “what is this for?” So what is this?" But for children it doesn’t matter at all - for them, owning these gizmos is a matter of “misfortune and happiness.” You can find them on the Internet in online stores at prices ranging from 350 to 3,000 rubles (from the most arrogant sellers). By the way, on Aliexpress you can buy a bucket of spinners for this amount. But not everyone is ready to wait.
Sellers claim that fidget spinners help children with autism. This, of course, is complete nonsense. But one thing is undeniable - children really like these “restless spinners”.
Perhaps all parents who have schoolchildren have seen how modern children behave during recess. Most of them, leaving the office, take smartphones and headphones out of their pockets and wander into the corners. When schoolchildren have spinners, immersion in virtual reality no longer arouses such interest. After all, playing with several spinners is always more interesting: you can, for example, build a tower out of them and spin them all at the same time, or just launch several at once and see whose spinner moves longer.
To be fair, it is worth noting that in the childhood of today’s parents there was something similar - many carried bearings to school. But the modern entertainment industry responds to the needs of children more quickly. And that's great! The only important thing is that modern children like fidget spinners. And it's really cool!
And in continuation of the topic, a story about.
If you found an unidentified item in your grandmother’s attic, in your grandfather’s garage, somewhere at a flea market or in your purse and want to know what kind of thing you got, contact specialists online, they know everyone here and will definitely help you with identification)
1. We have these things on the ceiling all over our house.
Old fire heat detector. Determines the rate of temperature change in the room, and signals if it increases sharply.
2. Found it labeled "unidentified item" in a thrift store.
Hanging spindle with a weight in the form of a circle. Apparently, the stick was torn off from below.
3. These things just flew over my house in Los Angeles.
The Bell V-22 Osprey tiltrotor is a mixture of a helicopter and an airplane. Military aircraft.
4. Brass tube 10 cm long, with a mirror and a hinged loop. Found it in my grandfather's things.
An apparatus for inspecting the inner surface of a weapon barrel.
5. Found this thing during renovation. What is this?
Coconut grater. An example of a similar grater
6. Can anyone tell me what the hell this is?
An old hand warmer. Light the charcoal stick on one side, after 10 minutes the heating pad warms up and will heat for about 9 hours. You can set it on fire from both sides, it will be warmer, but it will also burn faster. After combustion, you can shake off the coal and put in a new one.
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