Count the number of lines in the image below ?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

Can you make four (4) nines (9) equal 100?

Can you find out who is the kidnapper in below Picture and why, Explain ?

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

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

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

Count the number of triangles in the below picture?

In which direction should the missing arrow point?

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?