If it took eight men ten hours to build a wall, how long would it take four men to build it?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

John was piloting a plane behind a car but was never able to overtake it. Why?

Suppose you are sitting in an interview and the interviewee asks you an aptitude question.

You have three buckets with a capacity of 4 litres, 8 litres and 10 litres and you have a large tank of water. Now you have to measure 3 litres of water precisely using those buckets. How will you do it?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

What is next number in the pattern below:

131 517 192 123 ?

What can go through glass without breaking it?

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.

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