If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

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.

What is next number in the pattern below:

131 517 192 123 ?

What building has the most stories?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?