Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

In the image given, you can find several triangles. Can you count them all?

Why is the longest human nose just 11 inches?

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?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

A bus driver was heading down a street in Mexico. He went right past a stop sign without stopping, he turned left where there was a "no left turn" sign, and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?

What is the next number in this matchsticks series riddle?