Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

There is one four-digit whole number n, such that the last four digits of n2 are the original number n

Using Only Five 5's and any mathematical operator make sum as 37

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

I guess 76.8% of readers will like this riddle.

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

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?