Hi all,
There's a DS question that goes like this:
A certain list consists of several different integers. Is the product of all the integers in the list positive?
(1) The product of the greatest and smallest of the integers in the list is positive.
(2) There is an even number of integers in the list.
The correct answer is given as C.
From what I understand for this question, odd X odd = odd, and odd X even = even. So if there's at least one even integer in the list, and 0 is not in the list, then the product of all the integers would be positive. So I thought (1) is sufficient because it shows that at least one integer is even, and that either the greatest and smallest integers are both negative or both positive, in which case 0 can't be in the list.
(2) is not sufficient because it doesn't tell you whether 0 or at least one even integer is in the list.
I must have a blind spot somewhere, can anyone help me? Really appreciate it!!!
There's a DS question that goes like this:
A certain list consists of several different integers. Is the product of all the integers in the list positive?
(1) The product of the greatest and smallest of the integers in the list is positive.
(2) There is an even number of integers in the list.
The correct answer is given as C.
From what I understand for this question, odd X odd = odd, and odd X even = even. So if there's at least one even integer in the list, and 0 is not in the list, then the product of all the integers would be positive. So I thought (1) is sufficient because it shows that at least one integer is even, and that either the greatest and smallest integers are both negative or both positive, in which case 0 can't be in the list.
(2) is not sufficient because it doesn't tell you whether 0 or at least one even integer is in the list.
I must have a blind spot somewhere, can anyone help me? Really appreciate it!!!
