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

What does below rebus means ?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

What can you see in the middle of March and April that you can never see in any other month?

In a guessing game, five friends had to guess the exact numbers of apples in a covered basket.
Friends guessed 22, 24, 29, 33, and 38, but none of the guesses was correct. The guesses were off by 1, 8, 6, 3, and 8 (in random order).

Can you determine the number of apples in a basket from this information?

I always drive my customer away.

Who am I?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

Can you solve the below geography rebus by decoding the below rebus ?

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?