Difference between revisions of "2011 AMC 12B Problems"
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==Problem 4== | ==Problem 4== | ||
+ | In multiplying two positive integers <math>a</math> and <math>b</math>, Ron reversed the digits of the two-digit number <math>a</math>. His erroneous product was 161. What is the correct value of the product of <math>a</math> and <math>b</math>? | ||
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+ | <math>\textbf{(A)}\ 116 \qquad \textbf{(B)}\ 161 \qquad \textbf{(C)}\ 204 \qquad \textbf{(D)}\ 214 \qquad \textbf{(E)}\ 224</math> | ||
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+ | [[2011 AMC 12B Problems/Problem 4|Solution]] | ||
==Problem 5== | ==Problem 5== |
Revision as of 13:37, 26 February 2011
Contents
- 1 Problem 1
- 2 Problem 2
- 3 Problem 3
- 4 Problem 4
- 5 Problem 5
- 6 Problem 6
- 7 Problem 7
- 8 Problem 8
- 9 Problem 9
- 10 Problem 10
- 11 Problem 11
- 12 Problem 12
- 13 Problem 13
- 14 Problem 14
- 15 Problem 15
- 16 Problem 16
- 17 Problem 17
- 18 Problem 18
- 19 Problem 19
- 20 Problem 20
- 21 Problem 21
- 22 Problem 22
- 23 Problem 23
- 24 Problem 24
- 25 Problem 25
Problem 1
What is
![$\frac{2+4+6}{1+3+5}-\frac{1+3+5}{2+4+6}?$](http://latex.artofproblemsolving.com/6/1/e/61ee8366705dde051791b9e949cc4eaf30da1215.png)
Problem 2
Josanna's test scores to date are ,
,
,
, and
. Her goal is to raise her test average at least
points with her next test. What is the minimum test score she would need to accomplish this goal?
Problem 3
LeRoy and Bernardo went on a week-long trip together and agreed to share the costs equally. Over the week, each of them paid for various joint expenses such as gasoline and car rental. At the end of the trip it turned out that LeRoy had paid dollars and Bernardo had paid
dollars, where
. How many dollars must LeRoy give to Bernardo so that they share the costs equally?
Problem 4
In multiplying two positive integers and
, Ron reversed the digits of the two-digit number
. His erroneous product was 161. What is the correct value of the product of
and
?