Difference between revisions of "1990 AHSME Problems/Problem 17"
(Created page with "== Problem == How many of the numbers, <math>100,101,\cdots,999</math> have three different digits in increasing order or in decreasing order? <math>\text{(A) } 120\quad \text{(...") |
(→Solution) |
||
| Line 9: | Line 9: | ||
== Solution == | == Solution == | ||
| − | <math>\fbox{ | + | <math>\fbox{C}</math> |
== See also == | == See also == | ||
Revision as of 14:18, 3 August 2015
Problem
How many of the numbers, 
have three different digits in increasing order or in decreasing order?
Solution
See also
| 1990 AHSME (Problems • Answer Key • Resources) | ||
| Preceded by Problem 16 |
Followed by Problem 18 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 • 26 • 27 • 28 • 29 • 30 | ||
| All AHSME Problems and Solutions | ||
The problems on this page are copyrighted by the Mathematical Association of America's American Mathematics Competitions. 
