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

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

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

Can you count the number of squares in the figure below?

Identify the movie name through below Rebus containing Pi Mouse and coconut tree..

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

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

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?