What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

Can you fill the blank with the correct number?

6 30 870 756030 _____

How can a man go eight days without sleep?

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

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

John was a very careless driver, so his owner Jacob gave him an offer that he will get an incentive of Rs.30 for every bottle box he delivered without breaking it and he will be charged Rs.90 for every bottle box he broke. Jacob gave John 100 bottles-box to deliver. After delivery, Jacob paid John Rs.2400. How many bottles-box did John break?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?