What goes up but never comes down?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

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

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

What number do you get when you multiply all of the numbers on a telephone's number pad?

O_er_t_o_

Complete the missing letters of the given word.

Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's the youngest?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

When can we add 2 to 11 and get 1 as the correct answer?