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SVP
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Is a sum of three integers A, B, and C even? (1) A+B=A (2) [#permalink]
 29 May 2003, 03:36
Is a sum of three integers A, B, and C even?
(1) A+B=A
(2) B+C=A
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Manager
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stolyar wrote: Is a sum of three integers A, B, and C even?
(1) A+B=A
(2) B+C=A
For this question, I voted B.
Is it right?
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I like this question.
At first it may seem that the fastest way is picking numbers, as always -
3+3 = 6 sum even
2+3 = 5 sum is even
3+0 = 3 sum is odd
4+0 = 4 sum is even
But it does not really lead us to anything.
Let's try the formulae:
(1) B=0
(2) C=A
Combine and we get that the sum of the integers is 2A - always even - screw the numbers.
-=-
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I guess B
first, statement I show only the value of B, if A =2 B= 0 C= 3
the sum of three numbers is odd. however if A=2 B=0 C =4
the sum of three numbers is even. Thus, insufficient.
From statement II, it means that the outcome will always be 2*(B+C).
Hence. sufficient.
All thing considered, the answer is utterly B
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I like that you like my questions.
 Yes, it is B.
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