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

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

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

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

What is next number in the pattern below:

131 517 192 123 ?

Can you find the six hidden animals in the picture below?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

As shown in the picture below, we can see a boy hanging on the tree branch to save his life. There are various ways in which he can die like1. A snake hanging toward the right waiting to bite the boy.2. A roaring Lion near the tree.3. Two crocodiles are ready to attack if the boy reaches near water. The tree is chopped to some extent, so can fall as if he moves a lot. Can you give this boy an escape plan?