How many pluses should we put between the digits of 987654321 to get a total of 99, and where?
You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.
How will you decide which one of those is magnet?
You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?
Using Only Five 5's and any mathematical operator make sum as 37
Do You See It?
On a magical land of Mexico , all the animal in the land are rational.
There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).
If we leave them for some time then how many goat and tiger will be there , when we come back ?
Which part of London exists in France as well ?
Edward James went for tiger hunting.
It was not his lucky day.
He got six tigers without heads, nine tigers without the tail and eight cut in two halves.
How many tiger did he hunted ?
A man dies of old age on his 25 birthday. How is this possible?
A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?
It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.