1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

10+10 and 11+11 can give you the same answer.

Explain how?

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?

The dirtier I get, the whiter I look. Who am I?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

How many triangles are there on the puzzle below?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?