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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?
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.
How can a baby fall out of a 30-story building onto the ground and still be alive?
The baby fell from the first floor.
Which is the missing number in the yellow circle?
The missing number is 12. Each number is equal to the sum of the digits of the numbers pointing towards it.
Circles are particles and lines joining them are bonds. The objective is to find all the hidden values, following these four rules:
The solutions are shown below.
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?
Call the 3 liter jug “small” the 5 liter jug “large”.
Now there are exactly 4 liters of water in the large jug.
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?
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.
At some point in Leonel Messi’s career, the football player had less than 80% success when performing penalty kicks. Later in his career, he had more than 80% success when performing penalty kicks. Show that there was a moment in Leonel Messi’s career
Let us see that it is impossible for Messi to jump from under 80% success rate to over 80% success rate in just one attempt. Indeed, if Messi’s success rate was below 80% after N attempts, then he scored at most 4N/5 – 1/5 = (4N-1)/5 times. If his success rate was above 80% after N+1 attempts, then he scored at least 4(N+1)/5 + 1/5 = (4N-1)/5 + 6/5 times. However, Messi can not score more than one goal in a single attempt, which completes the proof.
There were five men going to church and it started to rain. The four that ran got wet and the one that stood still stayed dry.
Four of the men were carrying a dead man in a coffin to his funeral.
What day would yesterday be if Thursday was 4 days before the day after tomorrow?
The answer is Friday.
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?
The girl assumed the man was a family friend, so she decided he would come also to the funeral of her sister.
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