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If \(a, b, c, d\) are \(4\) non-negative integers. Is \(a+c\) even?
1. \(a^2+b^2+c^2\) is even.
2. \(b^2+c^2+d^2\) is even.
Answer: E
Source: e-GMAT
1. \(a^2+b^2+c^2\) is even.
2. \(b^2+c^2+d^2\) is even.
Answer: E
Source: e-GMAT
