There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Replace the question mark with the correct number.

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

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?

Which digit occurred maximum times between the number 1 and 1000?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

I cannot talk, but I always reply when spoken to. What am I?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

Can you decipher the below rebus?

PBLUESAISNUERSES