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crackgmat007
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Numbers in the list
Source: Beat The GMAT — Data Sufficiency |
Consider the set with elements {2, 0 , 0} In this case , the product of any two numbers is 0 but not every element is 0. Hence A is insufficient.
Question says there are no more than 2 numbers in the list..
so the list can also be {2, -2} or {0, 0}
So how is statement B sufficient?
so the list can also be {2, -2} or {0, 0}
So how is statement B sufficient?
raghavsarathy wrote:Consider the set with elements {2, 0 , 0} In this case , the product of any two numbers is 0 but not every element is 0. Hence A is insufficient.
Its a Yes/No question.
Actually B is suefficient because it says that sum of any 2 numbers is always 0. This can only happen if all the numbers are 0's in the set.
It does not work for any other set of numbers.
lets try (2,-2,2,-2,..) sum of 2 & -2 is 0, but not sum of 2 & 2 or -2 & -2.
Actually B is suefficient because it says that sum of any 2 numbers is always 0. This can only happen if all the numbers are 0's in the set.
It does not work for any other set of numbers.
lets try (2,-2,2,-2,..) sum of 2 & -2 is 0, but not sum of 2 & 2 or -2 & -2.
Damn...I read the question as "no more than 2 numbers in the list"
Got it wrong.
Got it wrong.
pandeyvineet24 wrote:Its a Yes/No question.
Actually B is suefficient because it says that sum of any 2 numbers is always 0. This can only happen if all the numbers are 0's in the set.
It does not work for any other set of numbers.
lets try (2,-2,2,-2,..) sum of 2 & -2 is 0, but not sum of 2 & 2 or -2 & -2.
