Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

If 21x = 79x, what is the value of x?

Astrology starts with the alphabet A, Biology starts with B, Psychology with P and Limnology with L.

Can you find an "ology" that begins with a P?

I taste better than I can smell. Who am I?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?