What a Math

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




Similar Riddles

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

Asked by Neha on 23 Jun 2021


A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

Asked by Neha on 05 Mar 2022

What makes this number unique: 8,549,176,320?

Asked by Neha on 08 Jul 2025


When it is alive we sing, when it is dead we clap our hands. What is it?

Asked by Neha on 22 Aug 2025

Solve the riddle below:

If a Chicken says, 'All chickens are liars" is the chicken telling the truth?

Chicken Says Truth

Asked by Neha on 22 Jun 2026

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

Magical Wheels

Asked by Neha on 22 Sep 2024


There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

Asked by Neha on 20 Sep 2023

Ten coins have been arranged as you can see in the given picture. In this arrangement, a triangle is formed pointing upwards. You have to invert the position of the triangle and make it point downwards while changing the position of 3 coins only. Can you do it?

Visual Thinking Riddle

Asked by Neha on 05 May 2026

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

Asked by Neha on 11 Nov 2025


Can you solve the photo plexer logic ?

Logical Rebus

Asked by Neha on 14 May 2021

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The inventor of the Rubik’s Cube didn’t realize he’d built a puzzle until he scrambled it the first time and tried to restore it.