Number Trivia

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




Similar Riddles

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

Asked by Neha on 21 Apr 2025


One evening there was a murder in the home of a married couple, their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime.

The other one helped the murderer.

These are the things we know for sure:

1. The witness and the one who helped the murderer were not of the same sex.

2. The oldest person and the witness were not of the same sex.

3. The youngest person and the victim were not of the same sex.

4. The one who helped the murderer was older than the victim.

5. The father was the oldest member of the family.

6. The murderer was not the youngest member of the family.

Who was the murderer?

Asked by Neha on 20 Sep 2025

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

Matchsticks Equation

Asked by Neha on 19 Feb 2021


You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Asked by Neha on 12 Feb 2022

After undergoing a successful eye operation, A blind girl has just boarded a train to her home. The doctor asked her to open the bandages after 3 hours. On her train journey, she opened the bandages and within a fraction of the time she commits suicide by jumping off the train.

Though her operation was successful, Why did she commit suicide?

Asked by Neha on 15 May 2021

what does the below rebus means?

Funny Love

Asked by Neha on 31 Aug 2023


I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

Asked by Neha on 14 Apr 2022

Next Number in the Series,

5, 16, 49, 104, ?

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When does a USA Potato change its nationality?

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Which of the below owl is odd one out?

Find the odd

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In the 1920s, people feared that crossword puzzles would contribute to illiteracy.