A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

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

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I?

The more you take me, the more you leave me behind.
Who Am I?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?