The more it dries, the wetter it becomes. Can you tell what it is?

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

How many triangles are there on the puzzle below?

What is the fastest way to double your money?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Rearrange the letters in "new door" to make one word.

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?