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

What English word has three consecutive double letters?

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

Why 1729 is a magic number? Answer Logically.

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

What is harder to catch the faster you run?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

What number should come in place of the question mark below?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?