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Difference between revisions of "2005 AMC 12B Problems"
M1sterzer0 (talk | contribs) (→Problem 1) |
M1sterzer0 (talk | contribs) (→Problem 2) |
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== Problem 2 == | == Problem 2 == | ||
| − | + | A positive number <math>x</math> has the property that <math>x\%</math> of <math>x</math> is <math>4</math>. What is <math>x</math>? | |
| − | |||
<math> | <math> | ||
| − | \mathrm{(A)}\ | + | \mathrm{(A)}\ 2 \qquad |
| − | \mathrm{(B)}\ | + | \mathrm{(B)}\ 4 \qquad |
| − | \mathrm{(C)}\ | + | \mathrm{(C)}\ 10 \qquad |
| − | \mathrm{(D)}\ | + | \mathrm{(D)}\ 20 \qquad |
| − | \mathrm{(E)}\ | + | \mathrm{(E)}\ 40 |
</math> | </math> | ||
Revision as of 21:07, 17 April 2009
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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
- 26 See also
Problem 1
A scout troop buys 
candy bars at a price of five for 
dollars. They sell all the candy bars at the price of two for 
dollar. What was their profit, in dollars?
Problem 2
A positive number 
has the property that 
of is 
. What is ?
Problem 3
A rectangle with a diagonal of length is twice as long as it is wide. What is the area of the rectangle?
Problem 4
The average (mean) of 
numbers is 
30
20
\mathrm{(A)}\ \frac14x^2 \qquad
\mathrm{(B)}\ \frac25x^2 \qquad
\mathrm{(C)}\ \frac12x^2 \qquad
\mathrm{(D)}\ x^2 \qquad
\mathrm{(E)}\ \frac32x^2
$
