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

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

What is next number in the pattern below:

131 517 192 123 ?

Can you replace the question mark with the correct number?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

What month of the year has 28 days?

What's the only room from which no one can enter or leave

During which month do people sleep the least?

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?