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Source: — Problem Solving |
Senior | Next Rank: 100 Posts
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Re: problem

by yezz » Fri Oct 24, 2008 10:43 am
notgoodinmath wrote:If you have (a/b)/(c/d) x (e/f). Which answer below will not double the equation?

a. 2a
b. b/2
c. 2c
d. e/2
e. 2f
please post the original question? this one is not clear

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Re: problem

by Charming » Fri Oct 24, 2008 7:59 pm
notgoodinmath wrote:If you have (a/b)/(c/d) x (e/f). Which answer below will not double the equation?

a. 2a
b. b/2
c. 2c
d. e/2
e. 2f
Answer: C

The way of doing this:
1. simplify the equation. in the final format, a, d and f are numerators, and b, c and e are denominators.
2. to double the equation, you can either double the numerators or divide the denominators by 2. This is, 2a, 2d, 2f, b/2, c/2 or e/2 are all right answers.
3. clearly, 2c is the the only one NOT doubling the equation.
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