The 4 4s Give this challenge to students and write all the numbers from 1 to 20 on the board Then ask students to come to the board and write a solution any time they have one The more solutions you get for each number the better
May 25 2020 0183 32 Can you solve the four Four s puzzle by finding every number between 1 and 20 using only four of the number 4 and any mathematical operation Jan 2 2025 0183 32 You re given exactly four 4s and the freedom to use any mathematical operations you want including addition subtraction multiplication division square roots factorials and more With
The 4 4s
The 4 4s
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There is an old math problem in which you are challenged to use four 4s and any operations to write equations that have the numbers from 0 to 100 as the answer Shekhar Dutta has shared
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The 4 4s

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https://en.wikipedia.org › wiki › Four_fours
There are many variations of four fours their primary difference is which mathematical symbols are allowed Essentially all variations at least allow addition quot quot subtraction quot quot multiplication quot 215 quot division quot 247 quot and parentheses as well as concatenation e g quot 44 quot is allowed Most also allow the factorial quot quot exponentiation e g quot 44 quot the decimal point quot quot and the square root quot quot operation Other operations allowed by some variations include the reciprocal function quot 1 x quot subfactorial

http://www.murderousmaths.co.uk › books
Here are all the solutions to Sunny s Four 4 s Challenge If you find any errors please let us know
https://www.gleammath.com › post › the-four-fours
Jun 28 2020 0183 32 We have four fours and we have four operations and yet we re limited To illustrate this point try to answer this question There are exactly 11 other positive integers we

https://www.wheels.org › math
My answer to 73 is a good example of amusing complexity as is 27 Since all the answers are integers I started the search by generating a list of integers that could be build with one or two

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Oct 19 2023 0183 32 The Four Fours Puzzle is a challenge to create every whole number from 0 to infinity using mathematical expressions that only consist of four fours manipulated by any number of mathematical operations Do you like
Apr 23 2020 0183 32 My class is trying to solve the problem of the Four Fours The problem allows you to use only four fours and as many operations as you like in order to create mathematical sums There are many variations of four fours their primary difference is which mathematical symbols are allowed Essentially all variations permit addition quot quot subtraction quot quot multiplication quot 215 quot
Nov 10 2017 0183 32 Put four 4 s on a sheet of paper Then by placing one equation symbol x 247 between each of the fours get a total of all numbers 0 through 9 Don t forget your parenthesis