What a Math

If 21x = 79x, what is the value of x?




Similar Math Riddles

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Asked by Neha on 08 Jun 2023


Solve the mathematical equation in the picture below.

Math Equation Picture

Asked by Neha on 16 May 2023

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

Asked by Neha on 12 Dec 2024


A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

Asked by Neha on 07 May 2023

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

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How do you go from 98 to 720 using just one letter?

Asked by Neha on 08 Oct 2021


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

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A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

Asked by Neha on 26 Oct 2023

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

Asked by Neha on 13 Jun 2025


What does this mathematical rebus means ?

Maths Riddle

Asked by Neha on 01 Apr 2021

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