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.

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

what does this below rebus represent identXQQQQQME

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

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

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

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

How many times do a clock's hands overlap in a day ?