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1. x and y are even integers 2. x + y is divisible by 8

statement 1 : not suff

statement 2 : looks suff but wait... what if x = 5.25 and y = 2.75, (x+y) = 8 and (x-y) = 2.5 so x^2 - y^2 is not divisible by 8, even though x+y is..... not suff

1. x and y are even integers 2. x + y is divisible by 8

statement 1 : not suff

statement 2 : looks suff but wait... what if x = 5.25 and y = 2.75, (x+y) = 8 and (x-y) = 2.5 so x^2 - y^2 is not divisible by 8, even though x+y is..... not suff