You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one?

5 $ 4 $ 3 $ 9 = 4215
6 $ 9 $ 2 $ 6 = 3816
4 $ 7 $ 3 $ 3 = 1122
7 $ 2 $ 7 $ 4 = ____

Why is a river so rich ?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

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

What is both possible and impossible at the same time?

Can you spot the hidden girl in the picture below?

Why 1729 is a magic number? Answer Logically.