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

What does below Rebus say?

XLR8

How can you tell a raw egg from a hard-boiled egg?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

What am I?

In a chess board, the queen piece can move horizontally, vertically and diagonally freely. The picture represents the same.Can you place 8 queens on the board in a manner that none of the queens can attack each other?

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

A rain drop fell from one leaf to another leaf and lost 1/4th of its volume. It then fell to another leaf and lost 1/5th of the volume. It again fell on another leaf and lost 1/5th of the volume.



This process kept repeating till it fell on the last leaf losing 1/75th of its volume.



Can you calculate the total percentage of loss from the initial volume when the drop has fallen to the last leaf accurate up to two decimal places?

Can you divide the below-given shape into four equal and identical pieces?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?