If n is a whole number such that n + n = n, then n = ?
(a) 1 (b) 2 (c) 3 (d) None of these

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Solution

Here 0 + 0 = 0, 1 + 1 = 2, 2 + 2 = 4....
So, the statement n + n = n is true only when n = 0.
Hence, the correct option is (d).

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