Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

When it is alive we sing, when it is dead we clap our hands. What is it?

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

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

John and his wife were living in a rural place. On a particular day, John's wife fell ill and he called the local doctor. When the doctor picked up, he said, "Doctor, my wife is ill. She might have appendicitis."

"This can't be possible! I took out her appendix two years ago myself," the doctor explained.

When diagnosed, John's wife was found to have appendicitis. How can this be possible?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

What will you call your mother's brother's brother-in-law?

A non-stop marathon is the shared favourite sport of three brothers.

*The oldest one is fat and short and trudges slowly on.
*The middle brother's tall and slim and keeps a steady pace.
*The youngest runs just like the wind, speeding through the race.

"He is young in years, we let him run!" the other two brothers explained, "'because though he is surely number one, he is second, in a way." Why is it?

If a wheel has 54 spokes, how many spaces are there between the spokes?

When a clock is observed, the hour hand is at a minute mark and the minutes hand is six minutes ahead of it.

When the clock is observed again after some time, the hour hand is precisely on a different minute mark and the minute hand is seven minutes ahead of it.

Can you calculate how much time has elapsed between the two observations?