A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

If an electric train is travelling south, then which way is the smoke going?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

When 99 is considered higher than 100?

You are given 2 eggs.
You have access to a 100-storey building.
Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor, Both eggs are identical.
You need to figure out the highest floor of a 100-storey building an egg can be dropped without breaking.
Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process

The more of this there is, the less you see. What is it?

Can you find out the remainder when 3^300 is divided by 5?

Rearrange the letters in "new door" to make one word.

What is the probability of choosing the correct answer at random from the options below?

a) 1/4
b) 1/2
c) 1
d) 1/4