Number Trivia

Can you find out which number multiplied by itself will give the output as 12345678987654321?




Similar Riddles

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

What has 4 Letters

Asked by Neha on 15 Mar 2024


What does Alexander the Great and Winnie the Pooh have in common?

Asked by Neha on 17 Jul 2025

Which is heavier: a ton of bricks or a ton of feathers?

Asked by Neha on 28 Feb 2022


Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Asked by Neha on 03 Mar 2024

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

Asked by Neha on 07 Aug 2023

For this puzzle, you might have to find logic in something illogical. But hey, it's fun and a healthy little break from your strenuous puzzle-solving sessions.

Can you decipher the meaning in the following cluster of letters?

ITIT,NCENTCENT

Asked by Neha on 19 Nov 2025


A spaceship was lost. The detective was given a piece of paper. This was the location of the spaceship! This is what the slip had scribbled on it:
Juice, Umbrella, Potato, Ice, Tomato, Elephant, Rice.

Where is the spaceship?

Asked by Neha on 19 Jan 2026

Can you count the number of squares in the figure below?

Count the Square Puzzle

Asked by Neha on 15 Jan 2026

Can you identify the hidden rebus in the image below?

Name the Coded Animal

Asked by Neha on 01 Feb 2021


I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Asked by Neha on 25 Aug 2025

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Amazing Facts

Jigsaw puzzles

Jigsaw puzzles soared in popularity during the great depression, as they provided a cheap, long-lasting, recyclable form of entertainment.