2009 AMC 10B Problems/Problem 5
Revision as of 18:13, 27 February 2009 by VelaDabant (talk | contribs) (New page: {{duplicate|2009 AMC 10B #5 and 2009 AMC 12B #3}} == Problem == Twenty percent less than 60 is one-third more than what number? <math>...)
- The following problem is from both the 2009 AMC 10B #5 and 2009 AMC 12B #3, so both problems redirect to this page.
Problem
Twenty percent less than 60 is one-third more than what number?
Solution
Twenty percent less than 60 is . One-third more than a number n is
. Therefore
and the number is
. The answer is
.
See also
2009 AMC 10B (Problems • Answer Key • Resources) | ||
Preceded by Problem 4 |
Followed by Problem 6 | |
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 | ||
All AMC 10 Problems and Solutions |
2009 AMC 12B (Problems • Answer Key • Resources) | |
Preceded by Problem 2 |
Followed by Problem 4 |
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 | |
All AMC 12 Problems and Solutions |