Question

Suppose that each entry of $2015\times 2015$ matrix $M$ is a real number of magnitude not exceeding 1 . if the sum of entries in every $2\times 2$ matrix in $M$ is zero. Then sum of all entries of $M$ cannot exceed

• A. 1
• B. 0
• C. 2015
• D. None of these

Answer 1

Answer: (C)

Correct answer is (c) 2015