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

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

What is red and smells like blue paint?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

In the given picture, in how many ways can you read the word "Tiger"?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

A bus driver was heading down a street in Mexico. He went right past a stop sign without stopping, he turned left where there was a "no left turn" sign, and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?

When is the top of a mountain similar to a savings account?

Solve the following series:
AZ, GT, MN, __, YB