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?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?