let s and t be odd integers. is (s-t)/2 even?
1) s+t is even
2) s-t is even
oa after some discussion.
thnkx
1) s+t is even
2) s-t is even
oa after some discussion.
thnkx
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s+t is even
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E.
Sum/difference of two odd integers is always even. (1) and (2) don't give any info.
Examples
9 and 3, 9-3 = 6, 6/2 = 3 not even
5 and 1, 5 - 1 = 4, 4/2 = 2 even.
Sum/difference of two odd integers is always even. (1) and (2) don't give any info.
Examples
9 and 3, 9-3 = 6, 6/2 = 3 not even
5 and 1, 5 - 1 = 4, 4/2 = 2 even.
IMO E
same reason as above..... is there something fishy in this problem? cause otherwise it seems quite straight forward...as described in above post
same reason as above..... is there something fishy in this problem? cause otherwise it seems quite straight forward...as described in above post
