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operation "*"

by sanju09 » Fri May 21, 2010 4:22 am
The operation "*" represents either addition, subtraction, or multiplication of integers, what is the value of 1*0?

(1) 0*2 = 2.

(2) 2*0 = 2.
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by liferocks » Fri May 21, 2010 4:27 am
From 1,
0*2 = 2 this is possible only for 0+2..so '*' is addition and 1*0=1...sufficient

From 2
2*0 = 2..this is possible for both addition(2+0) and subtraction(2-0)...but for both cases 1*0=1 sufficient

Ans option D
Last edited by liferocks on Fri May 21, 2010 4:33 am, edited 1 time in total.
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by arohan_sambyal » Fri May 21, 2010 4:27 am
A alone is suffcient
i.0+2 =2
O*2 or 0-2 is not = to 2: A is sufficient
ii. 2+0=2-0=2, B is not sufficient
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by sanju09 » Fri May 21, 2010 4:30 am
But why is (2) not sufficient?
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by liferocks » Fri May 21, 2010 4:34 am
sanju09 wrote:But why is (2) not sufficient?
trapped ..thinking the question as what is '*'....edited the post.Btw I think today I edited more than posting reply...should take a break now.
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by sanju09 » Fri May 21, 2010 4:39 am
liferocks wrote:
sanju09 wrote:But why is (2) not sufficient?
trapped ..thinking the question as what is '*'....edited the post.Btw I think today I edited more than posting reply...should take a break now.
wait warrior wait...

OA is [spoiler]A[/spoiler], but I disagree, do you too?
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by liferocks » Fri May 21, 2010 4:40 am
sanju09 wrote:
liferocks wrote:
sanju09 wrote:But why is (2) not sufficient?
trapped ..thinking the question as what is '*'....edited the post.Btw I think today I edited more than posting reply...should take a break now.
wait warrior wait...

OA is [spoiler]A[/spoiler], but I disagree, do you too?
I too disagree..it has to be D
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by kstv » Fri May 21, 2010 6:10 am
The operation "*" represents either addition, subtraction, or multiplication of integers, what is the value of 1*0?
(1) 0*2 = 2.
(2) 2*0 = 2.

1) 0*2 = 2 here * has to be +. so 1*0 = 1 Sufficient.

2) 2*0 = 2 here * can be + or - .
1*0 is still 1 , whether * is + or -.
Sufficient.

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by arora007 » Wed Dec 15, 2010 3:10 am
This is a GMAT Prep question and I chose A.

I realized this folly after seeing the OA. nice trap thought!!
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by kapur.arnav » Wed Dec 15, 2010 10:35 am
arora007 wrote:This is a GMAT Prep question and I chose A.

I realized this folly after seeing the OA. nice trap thought!!
What's the OA... i also felt it is A... but after reading this again i feel that D should be correct...
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by arora007 » Wed Dec 15, 2010 1:15 pm
yes D is the OA.
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