Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

What does below Rebus mean ?

esgg sgeg gegs gsge

What's the only room from which no one can enter or leave

What has no start, end, or centre?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?

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