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

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

Asked by Neha on 27 Jul 2024


Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

River Crossing with one Torch

Asked by Neha on 31 Jul 2024

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?

Asked by Neha on 09 Feb 2026


Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair

Asked by Neha on 19 Aug 2021

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Asked by Neha on 21 Apr 2024

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Asked by Neha on 10 Apr 2022


Can you find a rabbit in the given picture?

Hidden Picture Riddle

Asked by Neha on 08 Apr 2023

Find the Goldfish below the given Image.

Find the Goldfish

Asked by Neha on 25 Feb 2025

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

Asked by Neha on 25 Apr 2024


Can you count the number of triangles in the picture below?

Count the Triangle

Asked by Neha on 11 Apr 2024

Hot Articles

Amazing Facts

Crossword puzzles

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