Puzzleprime Practical

🛠️ PRACTICAL PUZZLE • Advanced
Fold Into a Cube
Cut out the black shape and then fold it perfectly into a cube, without overlapping.
💡 Solution

If the size of each of the small edges of the shape is equal to 1cm, then its area is equal to 30cm². Thus, the cube that is formed by the shape must have an edge of length √5cm. If we set the center of the black shape to be the center of one of the cube’s faces, then the four closest vertices must lie on the boundary of the shape, √2.5cm away. This determines uniquely the folding of the shape which is shown on the simulation below.
created by Wossname

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🛠️ PRACTICAL PUZZLE • Expert
The Letter E
Click the image to enlarge it and download it. Then print it, cut out the three pieces, and rearrange them so that you get the letter “E”.
💡 Solution

Rearrange the pieces, so that they form the shadow of the letter “E”, as shown below.

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🛠️ PRACTICAL PUZZLE • Hard
Touch or Don’t Touch
For this puzzle/game, you need to keep presenting various words to your friends and telling them whether they are “TOUCH” or they are “DON’T TOUCH”. Below, we have listed several words from each category.
TOUCH: banana, proof, mouse, keyboard, promo, woman
DON’T TOUCH: cherry, solution, cat, screen, discount, girl
Can you guess what determines whether a word is “TOUCH” or “DON’T TOUCH”?
💡 Solution

Words that make your lips touch when pronounced belong to the “TOUCH” category, while the others belong to the “DON’T TOUCH” category. The sounds “P”, “B”, “M”, and “W” that cause this are called “bilabial”.

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🛠️ PRACTICAL PUZZLE • Advanced
We Go on Vacation
For this puzzle/game, you will need to find a group of friends, preferably 5 or more. The premise is that you will go together on a vacation but each of you can bring only specific items there. The rules regarding which items can be brought and which not are known by one of the players and the other ones are trying to guess them.
In the exchange below, George is the one organizing the trip and the one who knows which items the rest are allowed to bring.
GEORGE: I will take my guitar with me. What do you want to take?
SAM: Can I take an umbrella with me?
GEORGE: No, you cannot take an umbrella, but you can take some sunscreen.
HELLEN: Can I take a scarf with me?
GEORGE: No, you cannot take a scarf, but you can take a hat.
MONICA: Can I take a dress with me?
GEORGE: No, you cannot take a dress, but you can take some makeup.
Can you guess what the rules of the game are?
💡 Solution

Everyone is allowed to take with themselves only items whose first letter is the same as the first letter of their names. Thus, George can take a Guitar, Sam can take Sunscreen, Hellen can take a Hat, and Monica can take Makeup.

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🛠️ PRACTICAL PUZZLE • Medium
Pronunciation Puzzles
The following 2 puzzles rely on misleading phrasing of the questions. Read them aloud to your friends and let them ponder upon them.
What has 4 letters, sometimes 9, and never 5
One night a king and a queen stayed in a hotel. On the next day, three people checked out. Who was the third person?
There are 30 cows and 28 chickens. How many didn’t?
Pronounce the following words: T-W-A, T-W-E, T-W-I, T-W-O
As I was walking across the London Bridge, I met a man.
He tipped his hat, and drew his cane.
In this riddle, I said his name. What is it?
💡 Solution

The first puzzle is not a question. It is a statement, saying that the word “what” has 4 letters, the word “sometimes” has 9 letters, and the word “never” has 5 letters. There is nothing to solve, so the puzzle is figuring that out!
The second puzzle reads as “One knight, a king, and a queen stayed in a hotel.” Thus, the third person was the knight.
The third puzzle reads as “There are 30 cows and 20 ate chickens. How many didn’t?” Thus, the answer is that 10 cows didn’t eat chickens.
The fourth question often confuses people and they pronounce TWO as [twou] instead of [tuː].
The fifth riddle actually says: “He tipped his hat, ‘Andrew Hiscane'”. Thus, the name of the man is Andrew Hiscane.

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🛠️ PRACTICAL PUZZLE • Advanced
Square Impossible
Take a square (or circle) coaster. Then, cut a hole in a piece of paper with the shape of a square, so that the side of that square is half of the side (or the diameter) of the coaster. Now, your goal is to push the coaster through the hole without tearing the paper (you can fold it).
💡 Solution

Coming soon.

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🛠️ PRACTICAL PUZZLE • Hard
Cut and Arrange
Get a piece of paper with dimensions 9×12 with a 1×8 rectangular hole in the middle. Then, cut the paper into two pieces that can be arranged into a square. You can print out the shape below.
💡 Solution

The solution is shown below.

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🛠️ PRACTICAL PUZZLE • Medium
Petals Around the Rose
This is a puzzle that is best played with friends and real dice on a table. The rules require one of the players to throw 5 dice at once, and then answer correctly “how many petals there are around the rose”. The procedure gets repeated until everyone has discovered the secret rules of the puzzle or has given up.
How many throws do you need in order to figure out this classic puzzle?
There are 6 petals around the rose.
Roll Dice
💡 Solution

The roses are the middle dots on the dice, and the petals are the dots around them. Just count the number of all petals appearing on the five dice and you will get the answer. 1 -> 0, 2 -> 0, 3 -> 2, 4 -> 0, 5 - > 4, 6 -> 0.

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🛠️ PRACTICAL PUZZLE • Medium
Fascinating Dissection
First, print and cut the pieces below. Then, arrange them so that they form a triangle and then rearrange them so that they form a square.
💡 Solution

The solution is shown below.
What is fascinating about these dissections is that one can transform into the other by keeping the pieces attached to each other in a chain and simply rotating them around the hinge points.

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🛠️ PRACTICAL PUZZLE • Easy
The Fifth Pig
On this Dutch poster from WW2 you can see four pigs. Print the poster and try to find the fifth pig.
💡 Solution

After folding the poster along the lines, you will get the portrait of the fifth pig, Adolf Hitler.

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