calculus-geometry profile image 87

Find three ways to write a mathematical expression that equals 100 using only the digits 1-9 and the


symbols +, -, /, x (times), ^ (exponent), (, ), and ! (factorial). You must use each of the nine digits exactly once, but the operations can be used as many or as few times as needed. Here's an example of moderate complexity: 2^7 - (4x6) + (9-8) - (5!/(3+1)!) = 100. Here's a simpler example: (128/4) + 67 + 9 - 5 - 3 = 100. There are many possible solutions and you can get pretty creative.

sort by best latest

bubba-math profile image60

Best Answer Jim Bob (bubba-math) says

4 years ago
 |  Comment
  • bubba-math profile image

    Jim Bob (bubba-math) 4 years ago

    Found three more expressions:

    (1+2+3+4)x((56/7)/8 + 9) = 100,

    (((1+2)^3)x4 - 56/7)x(-8+9) = 100, and

    123 - 45 - 67 + 89 = 100.

    It was a nice challenge.


  • See all 2 comments
paxwill profile image81

paxwill says

4 years ago
 |  Comment
tussin profile image59

I'M BANNED Y'ALL!!!!!!!!!! (tussin) says

4 years ago
 |  Comment
  • calculus-geometry profile image

    TR Smith (calculus-geometry) 4 years ago

    Well, you can always try to challenge yourself as you just did by restricting yourself to a smaller set of operations.

working