Who can jump higher than a Mountain?

Why do people go to bed?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

Which city is three-fifths chick two third cat and 50% goat?

People make me, save me, change me, raise me. What am I?

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

Prove that twice of ten is the same as twice of eleven.

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?