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Math Revolution Daily quiz (Day 21)

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MathRevolution
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Math Revolution Daily quiz (Day 21) [#permalink] New post   Updated on: 09 Jan 2017, 22:59
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Math Revolution Daily quiz (Day 21)

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Originally posted by MathRevolution on 28 Nov 2016, 01:25.
Last edited by MathRevolution on 09 Jan 2017, 22:59, edited 1 time in total.
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sriramiitr
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Re: Math Revolution Daily quiz (Day 21) [#permalink] New post   30 Dec 2016, 01:09
Here is a more general explanation,
For any set of integers (three in this case), m, n, p, irrespective of the operation between them i.e. +/-, the odd/ even parity of the end result is fixed.
For example, if m(+/-)n(+/-)p is even/odd then m+n+p is even/odd respectively.

Statement 1, m+n-p=0(even), so m+n+p must be even. Sufficient.
Statement 2, m-n-p=6(even), so m+n+p must be even. Sufficient.

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Re: Math Revolution Daily quiz (Day 21) [#permalink] New post   16 Oct 2022, 02:14
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Re: Math Revolution Daily quiz (Day 21) [#permalink]
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