Measure by Hourglass

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 ?




Similar Riddles

If eleven plus two equals one, what does nine plus five equal?

Asked by Neha on 07 Oct 2021


John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?

Asked by Neha on 09 May 2025

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

Asked by Neha on 06 Sep 2025


John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

Asked by Neha on 14 Mar 2026

Can you find out which options fits best with the missing column?

Fit the Blocks

Asked by Neha on 28 Dec 2020

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

Asked by Neha on 16 May 2024


What's the only room from which no one can enter or leave

Asked by Neha on 15 Apr 2024

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

Asked by Neha on 09 Dec 2023

81 x 9 = 801. What must you do to make the this equation true?

Asked by Neha on 03 Oct 2021


I am an odd number. Take away a letter and I become even. What number am I?

Asked by Neha on 25 Feb 2022

Hot Articles

Amazing Facts

Artificial Intelligence

Artificial Intelligence has crushed all human records in the puzzle game “2048,” achieving a high score of 839,732 and beating the game in only 973 moves without using any undo.