Why do we preferably have round manhole covers and not square ones?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

How do you go from 98 to 720 using just one letter?

John gave half of the apples he had plus one more to Jacob. He gave half of the remaining ones plus one more to James. Now, John was left with just one apple.

Can you find out how many did he have in the beginning?

Solve the counting riddle by identifying the number of triangles in the given picture.

If 1+9+8=1, what is 2+8+9?

How many words can a pen with half refill write?

Complete the table series riddle by finding the number that can replace "??".

The centre of the third figure is empty. What digit should fit inside?

There were five men at church, and it started raining while they were outside. The four that ran still got wet, but the one that was still stayed completely dry. Why did he stay dry?