If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

What is the next number in this matchsticks series riddle?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

What is the coolest letter in the alphabet?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

What do you see in the given picture?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?