Difference between revisions of "2005 AMC 12A Problems/Problem 18"
m (→See also: cat) |
(solution) |
||
Line 1: | Line 1: | ||
== Problem == | == Problem == | ||
− | + | Two is <math>10 \%</math> of <math>x</math> and <math>20 \%</math> of <math>y</math>. What is <math>x - y</math>? | |
<math> | <math> | ||
− | (\mathrm {A}) \ | + | (\mathrm {A}) \ 1 \qquad (\mathrm {B}) \ 2 \qquad (\mathrm {C})\ 5 \qquad (\mathrm {D}) \ 10 \qquad (\mathrm {E})\ 20 |
</math> | </math> | ||
== Solution == | == Solution == | ||
− | + | <math>2 = \frac {1}{10}x \Longrightarrow x = 20,\quad 2 = \frac{1}{5}y \Longrightarrow y = 10,\quad x-y = 20 - 10=10 \mathrm{(D)}</math>. | |
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
== See also == | == See also == | ||
− | {{AMC12 box|year=2005| | + | {{AMC12 box|year=2005|before=First question|num-a=2|ab=A}} |
[[Category:Introductory Algebra Problems]] | [[Category:Introductory Algebra Problems]] |
Revision as of 09:02, 23 September 2007
Problem
Two is of and of . What is ?
Solution
.
See also
2005 AMC 12A (Problems • Answer Key • Resources) | |
Preceded by First question |
Followed by Problem 2 |
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 |