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What is the mean of four consecutive even integers a , b , c , d ?
1. a + d = b + c 2. b + c = d - a
Intresting question. B as OA is correct.
The mean of 4 consecutive even integers can never be even. In fact it is always an odd integer. Using st. 2, if b + c = d - a, the only possible values for a, b, c, and d are 0, 2, 4, and 6 respectively. So mean is 3.