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GMATT73
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If 50 Renmenbi equal 6 US Dollars, 1 US Dollar equals 120 21 Oct 2005, 09:30
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If 50 Renmenbi equal 6 US Dollars, 1 US Dollar equals 120 Yen, 100 Yen equal 75 Euros, 50 Euros equal 2500 Rupees, and 10 Rupees equal 3500 Vietnamese Dongs, what is the ratio of 1 Renmenbi to 1 Dong?

Any ideas on how to solve this problem in under two minutes :?: I remember something very similiar to this on the official test. Sorry, no OA.



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sudhagar
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If 50 Renmenbi equal 6 US Dollars, 1 US Dollar equals 120 21 Oct 2005, 09:37
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I am getting answer as 188000 Dong. Am I correct?

I think it took me approx 3 mins.
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GMATT73
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If 50 Renmenbi equal 6 US Dollars, 1 US Dollar equals 120 21 Oct 2005, 09:40
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Actually, it`s the methodology that`s most helpful. How did you get that answer?
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duttsit
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If 50 Renmenbi equal 6 US Dollars, 1 US Dollar equals 120 21 Oct 2005, 09:50
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I guess the trick is not to calculated intermediate numbers.

the question can be translated as:
1R = 6/50 D = 6/50 *120 Y = (6*120/50) * 75/100 E = (6*120*75/(50*100)) * 2500/50 R = {(6*120*75*2500) / (50*100*50)} * 3500 / 10 Dongs


just compute last term to get ratio.
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vikramm
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If 50 Renmenbi equal 6 US Dollars, 1 US Dollar equals 120 Updated on: 21 Oct 2005, 10:44
Originally posted by vikramm on 21 Oct 2005, 10:00.
Last edited by vikramm on 21 Oct 2005, 10:44, edited 1 time in total.
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189000?

50R = 6D
R=(6/50)D
Keep replacing the right side variable based on the other ratios given
we get
R = (6/50)(120)(75/100)(2500/50)(3500/10)V
R=189000V
or R/V = 189000/1
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ywilfred
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If 50 Renmenbi equal 6 US Dollars, 1 US Dollar equals 120 21 Oct 2005, 10:08
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1 RMB = (1/50)(6)(120)= 14.4 yen
14.4 Yen = (14.4/100)(75) = 10.8 Euros
10.8 Euros = 10.8/50 * 2500 = 540 Rupees
540 Rupees = 540/10 * 3500 = 189000 Dongs
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laxieqv
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If 50 Renmenbi equal 6 US Dollars, 1 US Dollar equals 120 21 Oct 2005, 10:26
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duttsit
I guess the trick is not to calculated intermediate numbers.

the question can be translated as:
1R = 6/50 D = 6/50 *120 Y = (6*120/50) * 75/100 E = (6*120*75/(50*100)) * 2500/50 R = {(6*120*75*2500) / (50*100*50)} * 3500 / 10 Dongs


just compute last term to get ratio.
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your method is very clever :wink:
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gsr
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If 50 Renmenbi equal 6 US Dollars, 1 US Dollar equals 120 21 Oct 2005, 11:36
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1R = 6/50 USD
1Y = 1/120 USD
1E = (100/75)(1/120) = 1/90 USD
1R = (1/50)(1/90) = 1/450 USD
1D = (10/3500)(1/450) = 1/3500*450

R/D = (6/50)*(3500*450) = 6*31500 = 189000
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If 50 Renmenbi equal 6 US Dollars, 1 US Dollar equals 120 21 Oct 2005, 12:55
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GMATT73
Actually, it`s the methodology that`s most helpful. How did you get that answer?
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Duttsit already answered the methodology. I was not 100% sure on the answer hence I didn't post the method to create a wrong impression.

I didn't calculate the intermediate step. I went on replacing one currency with other and ended up with the result.

Looks like I did some mistake in calculation, as my answer seemt to vary from others.
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HongHu
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If 50 Renmenbi equal 6 US Dollars, 1 US Dollar equals 120 21 Oct 2005, 18:35
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What I did was that multiply them all together without calculating all out (R=6/50*120*75/100*2500/50*3500/10 etc), because then you would be able to cancel a lot of them and the calculation would be much easier and faster.
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HIMALAYA
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If 50 Renmenbi equal 6 US Dollars, 1 US Dollar equals 120 21 Oct 2005, 20:04
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= (6/50) 120 (75/100) (2500/50) (3500/10) = 189,000
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GMATT73
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If 50 Renmenbi equal 6 US Dollars, 1 US Dollar equals 120 22 Oct 2005, 05:12
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Thanks a million gang :!: I got it :-D



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