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

What goes up but never comes down?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

I’m orange, I wear a green hat and I sound like a parrot. What am I?

A sundial has the fewest moving parts of any timepiece. Which has the most?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

Move four matchsticks to the below square to form three squares?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

Give it food and it will live; give it water and it will die.

What can jump higher than a building?