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

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

You can hear me, but you can't touch or see me.

What am I?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

10+10 and 11+11 can give you the same answer.

Explain how?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

How many words can a pen with half refill write?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?