John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

What is the word or phrase?

How many times do a clock's hands overlap in a day ?

A man is walking down a road with a basket of eggs. As he
is walking he meets someone who buys one-half of his eggs
plus one-half of an egg.
He walks a little further and meets another person who buys
one-half of his eggs plus one-half of an egg.
After proceeding further he meets another person who buys
one-half of his eggs plus one half an egg. At this point, he
has sold all of his eggs, and he never broke an egg.
How many eggs did the man have to start with?

Can you identify the famous TV character from the rebus below?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

Why is a river so rich ?

Why is the Hole below a Lock?

There is something which you can be arrested for attempting but not for successfully completing.