Difference between revisions of "2011 AMC 12A Problems"
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== Problem 4 == | == Problem 4 == | ||
[[2011 AMC 12A Problems/Problem 4|Solution]] | [[2011 AMC 12A Problems/Problem 4|Solution]] | ||
| + | At an elementary school, the students in third grade, fourth grade, and fifth grade run an average of 12, 15, and 10 minutes per day, respectively. There are twice as many third graders as fourth graders, and twice as many fourth graders as fifth graders. What is the average number of minutes run per day by these students? | ||
| + | |||
| + | <math> \textbf{(A)}\ 12 \qquad | ||
| + | \textbf{(B)}\ \frac{37}{3} \qquad | ||
| + | \textbf{(C)}\ \frac{88}{7}\qquad | ||
| + | \textbf{(D)}\ 13 \qquad | ||
| + | \textbf{(E)}\ 14</math> | ||
== Problem 5 == | == Problem 5 == | ||
Revision as of 14:25, 9 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
Solution
A cell phone plan costs 
20 dollars each month, plus 
cents per text message sent, plus 
cents for each minute used over 
hours. In January Michelle sent 
text messages and talked for 
hours. How much did she have to pay?
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Problem 2
Solution There are 5 coins placed flat on a table according to the figure. What is the order of the coins from top to bottom?
Problem 3
Solution A small bottle of shampoo can hold 35 milliliters of shampoo, whereas a large bottle can hold 500 milliliters of shampoo. Jasmine wants to buy the minimum number of small bottles necessary to completely fill a large bottle. How many bottles must she buy?
Problem 4
Solution At an elementary school, the students in third grade, fourth grade, and fifth grade run an average of 12, 15, and 10 minutes per day, respectively. There are twice as many third graders as fourth graders, and twice as many fourth graders as fifth graders. What is the average number of minutes run per day by these students?
