What has many keys but can’t open a single lock?

Can you replace the question mark with the correct number?

Why is a river so rich ?

John was piloting a plane behind a car but was never able to overtake it. Why?

what one word does the below rebus identifies?

If eleven plus two equals one, what does nine plus five equal?

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?

Replace the question mark with the correct number in below Picture:

A man dies of old age on his 25 birthday. How is this possible?

Can you name an animal whose killing cannot be performed without spilling your own blood?