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

Eight of us go fourth, not back, to protect our king from an attack. What are we?

Can you place three balls such that the equation shown in the picture holds true?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?