If 1+9+8=1, what is 2+8+9?

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

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

There are three boxes. One is labeled "APPLES" another is labeled "ORANGES". The last one is labeled "APPLES AND ORANGES". You know that each is labeled incorrectly. You may ask me to pick one fruit from one box which you choose.

How can you label the boxes correctly?

Five teams were competing in cricket where they faced each other exactly once. After the tournament, the following is the point table.

DareDevils 6
SuperKings 5
Royals 4
Sunrisers 2
Riders ?

How many points did Riders end up with?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

What kind of band never plays music?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?