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

James bond was pushed out of an aeroplane without any parachute.
He survived, How come?

Asked by Neha on 28 Sep 2024


Count the squares in the matchstick puzzle below?

Count the Squares

Asked by Neha on 17 Sep 2023

I have branches, but no fruit, trunk or leaves. What am I?

Asked by Neha on 18 May 2022


Which country gets ill every time?

Asked by Neha on 14 Feb 2025

Which five letter word can be added at the end of below word to form a
valid word?

> Pin
> Check
> Boiling
> View

Asked by Neha on 13 Aug 2021

What does below Rebus mean ?

esgg sgeg gegs gsge

Asked by Neha on 10 May 2021


How many triangles do you see in the picture puzzle below?

Count the triangles Puzzle

Asked by Neha on 08 Jul 2026

Solve the puzzle by telling what does below picture means.

Solve by Name Puzzle

Asked by Neha on 28 Nov 2025

How many times do a clock's hands overlap in a day ?

Clock Hand Overlapping

Asked by Neha on 31 Mar 2021


What is common among 11, 69, and 88?

What is common here

Asked by Neha on 15 Sep 2023

Hot Articles

Amazing Facts

Out of the Box

The phrase “thinking outside the box” was popularised from the solution to a topographical puzzle involving 9 dots in a box shape.