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D01-07

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Re: D01-07  [#permalink]

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New post 20 Apr 2018, 05:50
shahul. wrote:
property does nt hold true for 6/3 vs 12/9 chetan2u . where am i going wrong ?



The property will hold true for fractions <1..
6/3 and 12/9 are >1..

Denominator has to be greater than numerator for this..
Fractions greater than 1 will have NUMERATOR>denominator an the effect will be opposite here..

Reason when you increase smaller number , it could be numerator or denominator, the effect will be more than same increase in bigger number..
Since a number say 6 will be a bigger % of smaller number..
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1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html


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Re: D01-07  [#permalink]

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New post 27 Jun 2018, 04:31
HARRY113 wrote:
Straight forward E)

Use Componendo and dividendo theorem.
If A/B = C/D = > (A+B)/(A-B) = (C+D)/(C-D) by Componendo and dividendo.

You will achieve at the right answer in seconds.



There's a rule, If you keep adding 1 to both numerator and denominator of a fraction, the value of the fraction approaches 1. Applicable in both cases 1) when numerator > denominator (value will increase) and 2) numerator < denominator (value will decrease).
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Re: D01-07  [#permalink]

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New post 08 Oct 2018, 02:05
we can write all the fractions as 1-3/D. Now the number to be max. 3/D should be minimum. 3/D will be minimum when D is maximum. so answer should be C (456) rather than E (449).
chetan2u, Bunuel..
Could you please let me know where am i going wrong in the above approach
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Re: D01-07  [#permalink]

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New post 08 Oct 2018, 02:14
R999 wrote:
we can write all the fractions as 1-3/D. Now the number to be max. 3/D should be minimum. 3/D will be minimum when D is maximum. so answer should be C (456) rather than E (449).
chetan2u, Bunuel..
Could you please let me know where am i going wrong in the above approach



Correct inference but you are seeing 494 as 449..
E. 494 is > 456
So Ans E
_________________

1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html


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Re: D01-07 &nbs [#permalink] 08 Oct 2018, 02:14

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