Runs Around
What runs around the whole yard without moving?
SOLUTION
The answer is FENCE.
Difficulty: Medium
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Four Chains
You have four metal chains and each of them has three links. What is the minimal number of cuts you need to make so that you can connect the chains into one loop with twelve links?
SOLUTION
You need only three cuts – cut all the links of one of the chains and then use them to connect the ends of the remaining three chains.
Falling Baby
How can a baby fall out of a 30-story building onto the ground and still be alive?
SOLUTION
The baby fell from the first floor.
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Jugs with Water
You have a 3 liter jug, a 5 liter jug, and an infinite amount of tap water. How can you measure exactly 4 liters of water using the jugs?
SOLUTION
Call the 3 liter jug “small” the 5 liter jug “large”.
- Fill the large jug with water.
- Pour 3 liters of water from the large jug into the small jug.
- Empty the small jug with water.
- Pour the remaining 2 liters of water from the large jug into the small jug.
- Fill the large jug with water.
- Pour water from the large jug into the small jug, until the small jug is full.
Now there are exactly 4 liters of water in the large jug.
A Good Bet
Someone tells you: “I’ll bet you $1 that if you give me $3, I will give you $5 in return”. Is this a good bet?
SOLUTION
You should not accept the bet and give him $3. If the person gives you the $5, then you would have given him $1+$3=$4, and you would make a profit of $1. However, the person can simply not give you anything and you will lose $3-$1=$2.
What Day Would Yesterday Be
What day would yesterday be if Thursday was 4 days before the day after tomorrow?
SOLUTION
The answer is Friday.
A Dream Man at a Funeral
While at her own mother’s funeral, a girl meets a guy she doesn’t know. She thinks the guy is amazing – her dream man – and is pretty sure he could be the love of her life. However, she never asks for his name or number and afterwards can not find anyone who knows who he is. A few days later, the girl kills her own sister.
Why did she do it?
SOLUTION
The girl assumed the man was a family friend, so she decided he would come also to the funeral of her sister.
A Note in a Math Class
A boy receives a small note from a girl during his math class. He unfolds the note and sees the following expression.
What does it mean?
SOLUTION
If you fold the note the other way around, the message “I LOVE YOU” appears.
The Next Letter
Which is the next letter in the following sequence:
S S E N T T T T T T T T T T T T T T T T T T T T ?
SOLUTION
The answer is F. These are the first letters of the numbers Seventeen, Eighteen, Nineteen, Twenty, Twenty-one, and so on.
Eight Sticks
You have 8 thin sticks; 4 of them have length 1 and the other 4 have length 2. Arrange the sticks so that they form exactly 3 identical squares, without any leftovers.
SOLUTION
The solution is shown below.
