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?

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?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

There are two insects on a tile. Insect X is sitting on one side of the tile (point A) and Insect Y is sitting opposite on the other side of the tile (point B). Now both of them decide to change their position and thus X starts crawling to point B and Y starts crawling to point A. When they meet and pass each other in between, X takes 20 seconds to reach B and Y takes just 5 seconds to reach A.

Can you calculate the total time each of the insects took to change their positions?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

I guess 76.8% of readers will like this riddle.

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

Find three whole, positive numbers that have the same answer when multiplied together as when added together.