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 replace the question mark with the correct number?

Solve the mathematical equation in the picture below.

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

Before Mount Everest was discovered, what was the highest mountain in the world?

Why did Buffon take the goal with him after every Juventus match?

If you say my name, I will no longer exist. What am I?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?