Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

IXL@XL
Lv 7
IXL@XL asked in Science & MathematicsMathematics · 1 decade ago

Derive 99 using each of the digits 2,3,4 and 5 once only?

I was given a puzzle to do which involves using the digits 2,3,4 and 5 once only in an equation to derive all the numbers from 1 to 100. I did it, but 99 proved to be the difficult one to answer. Can anyone out there derive 99 using the four digits. Any mathematical method/symbology is allowable, only constraint is to use the digits once only?

Update:

Examples of equation construction

(5-4) x (3-2) equals 1

52 + 34 equals 86

(3 x 2) x (4 + 5) equals 54

1 Answer

Relevance
  • Paula
    Lv 7
    1 decade ago
    Favorite Answer

    5^3 - 4! - 2

Still have questions? Get your answers by asking now.