Maths Logic

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10




Similar Riddles

Do You See It?

Do You See It?

Asked by Neha on 17 Feb 2022


How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Asked by Neha on 17 May 2021

What Deficiency does the below rebus represent?

VIT_MIN

Asked by Neha on 09 Jun 2024


Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?

Asked by Neha on 25 Mar 2023

If two's company, and three's a crowd, then whats four and five ?

Complicated counting

Asked by Neha on 22 Feb 2021

Below rebus represent famous DiCaprio movie. Can you name it?

Decode the Rebus

Asked by Neha on 27 May 2021


An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

Asked by Neha on 23 Feb 2022

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

Asked by Neha on 30 Oct 2023

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?

Replace Shaped Puzzle

Asked by Neha on 05 Oct 2025


You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

Asked by Neha on 21 Mar 2023

Hot Articles

Amazing Facts

Challenging

There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.