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The sum of the consecutive integers from
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20 Oct 2017, 02:46
20 Oct 2017, 02:46
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Question Stats:
72% (00:20) correct
27% (00:28) wrong based on 136 sessions
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Quantity A |
Quantity B |
The sum of the consecutive integers from -12 to 13 |
13 |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Re: The sum of the consecutive integers from
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20 Oct 2017, 04:50
20 Oct 2017, 04:50
2
The sum of the integers from -12 to 13 is equal to 13, since numbers cancel out as -12+12 = 0, -11+11 = 0, and so on. 13 is the only one that remain.
Then, the two quantities are equal and the answer is C
Then, the two quantities are equal and the answer is C
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
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Re: The sum of the consecutive integers from
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05 Jul 2020, 06:16
05 Jul 2020, 06:16
1
Carcass wrote:
Quantity A |
Quantity B |
The sum of the consecutive integers from -12 to 13 |
13 |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
QUANTITY A: (-12) + (-11) + (-10) + . . . + (-3) + (-2) + (-1) + 0 + 1 + 2 + 3 + . . . + 10 + 11 + 12 + 13
Notice that the RED values cancel out with the BLUE values.
For example, (-12) + 12 = 0
And (-11) + 11 = 0
And (-10) + 10 = 0
etc
So, after all of the red and blue values add to be zero, we're left with:
QUANTITY A: 13
QUANTITY B: 13
Answer: C
Cheers,
Brent
