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

Count the number of triangles in the below picture?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Can you make four (4) nines (9) equal 100?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

why number 8549176320 is one of a kind?

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.

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