Mathematical Fraction

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()




Similar Riddles

Three cars are driving on a track that forms a perfect circle and is wide enough that multiple cars can pass anytime. The car that is leading in the race right now is driving at 55 MPH and the car that is trailing at the last is going at 45 MPH. The car that is in the middle is somewhere between these two speeds.
Right now, you can assume that there is a distance of x miles between the leading car and the middle car and x miles between the middle car and the last car and also, x is not equal to 0 or 1.
The cars maintain their speed till the leading car catches up with the last car and then every car stops. In this scenario, do you think of any point when the distance between any two pairs will again be x miles i.e. the pairs will be x distance apart at the same time ?

Asked by Neha on 08 May 2021


What has 88 keys?

Asked by Neha on 09 Jul 2025

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

Asked by Neha on 04 Mar 2025


In a particular village, only two barbershops exist.

The first shop has a handsome barber with a neat haircut who is handsomely dressed in clean clothes and is extremely humble with his body language. The place is clean and looks hygienic.

In the second shop, you can find a barber with shabby clothing. His hairs are weirdly cut and his clothes still have the stains from last night's dinner. The place is not clean as well and reeks a bit.

You visit the village for the first time and decide to get your haircut. Which barbershop will you like to go for that and why?

Asked by Neha on 25 Apr 2026

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

Who is Who

Asked by Neha on 16 Mar 2021

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

Asked by Neha on 01 Mar 2021


In a secret society, a buried chamber can be accessed only via a secret password. The password is seven characters long and comprises of just letters and numbers.

You find a code that can help you in cracking the password. The code says "You force heaven to be empty".

Can you deduce the password from that?

Asked by Neha on 14 May 2021

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

Asked by Neha on 01 May 2025

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

Asked by Neha on 14 Feb 2022


It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

Asked by Neha on 25 Mar 2025

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Crossword puzzles

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