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Of the numbers r+s, r-s, r x s, and r/s, which is greatest?

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Intern
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B
Joined: 08 Feb 2015
Posts: 3
Of the numbers r+s, r-s, r x s, and r/s, which is greatest?  [#permalink]

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New post 15 Nov 2016, 12:47
5
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

77% (00:34) correct 23% (00:35) wrong based on 296 sessions

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Of the numbers r+s, r-s, r x s, and r/s, which is greatest?

1) r=s=1

2)r-s is the least of the numbers
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Re: Of the numbers r+s, r-s, r x s, and r/s, which is greatest?  [#permalink]

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New post 16 Nov 2016, 02:08
5
3
S1 - r=s=1, therefore r+s=2; r-s=0; r x s=1; r/s = 1
hence greatest is r+s.

S2 - r-s is the least.
When r=s=1, r+s is greatest.
Suppose, when r=3,s=2
r+s=5; r-s=1; r x s=6; r/s = 3/2 which gives r x s as the greatest.
Since we get two different values, so B not sufficient.

Hence answer is A.

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Re: Of the numbers r+s, r-s, r x s, and r/s, which is greatest?  [#permalink]

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New post 28 Jul 2018, 08:49
1
the best way to solve the problem will be to assume numbers and A fits nicely
Intern
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Re: Of the numbers r+s, r-s, r x s, and r/s, which is greatest?  [#permalink]

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New post 28 Aug 2018, 07:12
Hi, correct Answer is option D. Even though I don't know why. I was reviewing my answers on the mock test and it showed option A as wrong answer. Anyone here who knows the reason why D is the right answer? (P.s. can't upload image because I'm a new user)
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Re: Of the numbers r+s, r-s, r x s, and r/s, which is greatest?  [#permalink]

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New post 28 Aug 2018, 07:19
shivamsharma wrote:
Hi, correct Answer is option D. Even though I don't know why. I was reviewing my answers on the mock test and it showed option A as wrong answer. Anyone here who knows the reason why D is the right answer? (P.s. can't upload image because I'm a new user)


Please check the question again.
The answer must be A.
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Intern
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Re: Of the numbers r+s, r-s, r x s, and r/s, which is greatest?  [#permalink]

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New post 30 Aug 2018, 07:21
souvonik2k wrote:
shivamsharma wrote:
Hi, correct Answer is option D. Even though I don't know why. I was reviewing my answers on the mock test and it showed option A as wrong answer. Anyone here who knows the reason why D is the right answer? (P.s. can't upload image because I'm a new user)


Please check the question again.
The answer must be A.


Yup, my bad. A is correct. Thanks!
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Re: Of the numbers r+s, r-s, r x s, and r/s, which is greatest?  [#permalink]

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New post 09 Nov 2018, 08:34
1) r=s=1
clearly r+s is greatest for these values

2)r-s is the least of the numbers
cant say
eg r=s=0.5 r=s is greatest
r=s=3 r*s is the greatest
not sufficient
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Re: Of the numbers r+s, r-s, r x s, and r/s, which is greatest? &nbs [#permalink] 09 Nov 2018, 08:34
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Of the numbers r+s, r-s, r x s, and r/s, which is greatest?

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