The centre of the third figure is empty. What digit should fit inside?

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?

What is the coolest letter in the alphabet?

Find the next number in the following series:
6, 14, 26, 98, __?

Can you guess the name of the month by looking the below rebus ?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

Can you make a six-letter word using the letters N, A and B ?