1-20 Using Only 4 4s Photo & File Content Updates #821

Name: 1-20 Using Only 4 4s Photo & File Content Updates #821
Uploaded: 2026-08-12T13:40:25+0800
Duration: 18 min 11 s
Description: Begin Watching Instantly premium 1-20 using only 4 4s with unparalleled picture quality. Continuously updated & available at no cost on the video streaming hub.

2026-08-12T13:40:25+0800 • minute read

Contents

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Try it on your own, but stay tuned for huzefa's explanation In fact the first two have been done for you, 1 = 44/44 and 2 = 4/4 + 4/4. Check back every friday for more awesome math puzzles!

Number One

Use exactly four 4s to form every integer from 0 to 50, using only the operators. The challenge is for you to apply operations on four numbers 4 to get all integers from 1 to 20 1 = 44 / 442 = 4 * 4 / (4 + 4)3 = (4 + 4 + 4) / 44 = 4 + (4 * (4 - 4))5 = (4 + (4 * 4)) / 46 = 4 + ( (4 + 4) / 4)7 = (44 / 4) - 48 = 4 + 4 + 4 - 49 = 4 + 4 + (4 / 4)10 = (44 - 4) / 411 = (4 / 4) + (4 / .4)12 = (4 + 44) / 413 = 4 + ( (4 - .4) / .4)14 = (4 * (4 - .4)) - .415 = 4 + (44 / 4)16 = (44 - 4) * .417 = (4 * 4) + (4 / 4)18 = (44 * .4.

The image shows a table with numbers from 1 to 20 in the right column and empty spaces in the left column

The table is labeled the four fours problem and the instructions are to write each number from 1 to 20 using only the number 4 four times and any mathematical operations We need to find a combination of four 4s and mathematical operations that result in each. The problem it has been proposed that all whole numbers to infinity can be represented by four 4s and different operations Explore how this can be done for the numbers 1 to 20.