What word is pronounced the same if you take away four of its five letters?

How is a fly different from a mosquito?

Move four matchsticks to the below square to form three squares?

How can a man go eight days without sleep?

A river should be crossed by a father, a mother and their two sons and two daughters.
There are some rules that should be followed while crossing the river. There can be only two people in the raft while crossing. The daughters cannot be with their father unless there is the presence of the mother. The sons cannot be with their mothers unless the father is present. Unless the guard is on the board, the criminals cannot be with any of the family members. Only the adults like the father, the guard, and the mother knows to use the raft.

How will they cross the river?

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.

If eleven plus two equals one, what does nine plus five equal?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Why Aeroplane windows are round?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.