I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

What kind of band never plays music?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

Count the number of squares in the picture below.

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

John was piloting a plane behind a car but was never able to overtake it. Why?

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?