GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
The product of the odd integers between -8 to 8
[#permalink]
21 Jul 2019, 05:43
21 Jul 2019, 05:43
3
3
4
Bookmarks
00:00
Question Stats:
54% (00:42) correct
45% (00:55) wrong based on 296 sessions
Hide Show timer Statistics
Quantity A |
Quantity B |
The product of the odd integers between -8 to 8 |
The product of the even integers between -9 to 9 |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: The product of the odd integers between -8 to 8
[#permalink]
25 Jul 2019, 10:08
25 Jul 2019, 10:08
4
1
Bookmarks
anuppatel012 wrote:
Quantity A |
Quantity B |
The product of the odd integers between -8 to 8 |
The product of the even integers between -9 to 9 |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
We have:
Quantity A: (-7)(-5)(-3)(-1)(1)(3)(5)(7)
Quantity B: (-8)(-6)(-4)(-2)(0)(2)(4)(6)(8)
First recognize that, because Quantity B has a ZERO in its product, it must be ZERO:
Quantity A: (-7)(-5)(-3)(-1)(1)(3)(5)(7)
Quantity B: 0
So, our only task now is to determine whether Quantity A is positive or negative.
(-7)(-5)(-3)(-1)(1)(3)(5)(7) = (35)(3)(1)(3)(5)(7)
= A bunch of POSITIVE number multiplied together
= some POSITIVE number
So, we now have:
Quantity A: some POSITIVE number
Quantity B: 0
Answer: A
Cheers,
Brent
General Discussion
Re: The product of the odd integers between -8 to 8
[#permalink]
25 Jul 2019, 02:58
25 Jul 2019, 02:58
3
1
Bookmarks
In this question try to use logic and common sense rather than trying to multiply each side.
Remember the basic rule: -ve * -ve = +ve. In other words whenever even number of -ve's are multiplied always the product is a +ve number.
Also remember anything multiplied by 0 is always 0. This is the only logic the question is trying to test.
In qty A when you list the number to be multiplied you get an even numbers from -7 to 7 inclusive. i.e {-7,-5,-3,-1,1,3,5,7}.
In qty B when going from -ve to +ve there is 0 as well which will transform the whole product into 0
Hence it does not matter what is the value for qty A as long as we know that the value is +ve.
option A
Remember the basic rule: -ve * -ve = +ve. In other words whenever even number of -ve's are multiplied always the product is a +ve number.
Also remember anything multiplied by 0 is always 0. This is the only logic the question is trying to test.
In qty A when you list the number to be multiplied you get an even numbers from -7 to 7 inclusive. i.e {-7,-5,-3,-1,1,3,5,7}.
In qty B when going from -ve to +ve there is 0 as well which will transform the whole product into 0
Hence it does not matter what is the value for qty A as long as we know that the value is +ve.
option A
