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

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Can you find the missing piece of the Porsche?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Who always enjoys poor health?

What brings you down but never up?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?