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When Q is divided by W, the quotient is R and the remainder

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madzstar
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When Q is divided by W, the quotient is R and the remainder [#permalink] New post   07 May 2013, 13:57
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When Q is divided by W, the quotient is R and the remainder is E. Which of the following expressions is equal to E?

RW + Q
RW - Q
Q - RW
QW - R
Q/R

Ok really someone please tell me whats the different between Q-RW and RW-Q

Coz this is just nonesense for realy i got it wrong and put down RW-Q

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C
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Zarrolou
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Re: When Q is divided by W, the quotient is R and the remainder [#permalink] New post   07 May 2013, 15:56
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madzstar wrote:
When Q is divided by W, the quotient is R and the remainder is E. Which of the following expressions is equal to E?

RW + Q
RW - Q
Q - RW
QW - R
Q/R



\(Q=R*W+E\) es: 16=3*5+1

\(E=Q-R*W\) es:1=16-3*5
C
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Re: When Q is divided by W, the quotient is R and the remainder [#permalink] New post   07 May 2013, 20:30
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madzstar wrote:

Ok really someone please tell me whats the different between Q-RW and RW-Q

Coz this is just nonesense for realy i got it wrong and put down RW-Q



Madzstar, not sure I get ur question, but that's like the difference between 7 - 4 (= 3) and 4 - 7 (= -3)

With your answer, the sign will be inverted
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Re: When Q is divided by W, the quotient is R and the remainder [#permalink] New post   08 May 2013, 01:25
Q/W = R + E/W
Q -RW = E
Amswer: C

Other way can be picking numbers,

we know when 9 is divided by 4, quotient = 2 and remainder is 1
So Q = 9, W = 4, R = 2, E = 1
Substituting, these values in the equation , we are looking for an 1 as the answer
RW + Q = (2)(4) + 9 = 17
RW - Q = (2)(4) - 9 = -1,
Q - RW = 9 - (2)(4) = 1, which is the same as our remainder, CORRECT answer
QW - R = (9)(4) - 2 = 34
Q/R = 9/2 = 4.5
Answer: C

madzstar wrote:
Ok really someone please tell me whats the different between Q-RW and RW-Q

Coz this is just nonesense for realy i got it wrong and put down RW-Q


The difference between Q-RW and RW-Q, is that the sign will be inverted.
When in doubt, you can pick numbers, and confirm your answer
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Re: When Q is divided by W, the quotient is R and the remainder [#permalink] New post   25 May 2016, 18:00
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Re: When Q is divided by W, the quotient is R and the remainder [#permalink]
25 May 2016, 18:00
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