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Treebeard's Stumper
12 February 1999

Crunching 1999

Here's a repeat of last year's winter vacation challenge. Use just the four digits 1, 9, 9, 9 in that order, with parentheses and any standard math operations, to make all the numbers from 1 to 100. For starters,

1 = 1+(9-9)x9   (+,-, x, and /)
2 = (1^9)+(9/9)   (^ is the power of)
3 = 1+sqrt(9)-(9/9)   (square root)
4 = -1+sqrt(9)!-(9/9)   (factorial, 3!=1x2x3=6)

We've managed to get all the numbers using the digits of 1997 and 1998. Can we do it again this year?

Answer


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Copyright © 1999 by Marc Kummel / mkummel@rain.org