How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Prove that the below maths equation is true.

8 + 8 = 91

It is always ahead of me yet I can never see it. What is it?

What is the fastest way to double your money?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?