NDA Exam 2013 – Which number replaces the question mark?
8, 1
The phrasing of the question (number instead of numbers) provides the clue that each pair of digits in a row forms a two-digit number. So representing the grid as two-digit numbers we have:
73, 46, 19 (delta -27)
11, 9, 7 (delta -2)
52, 42, 32 (delta -10)
99, 50, 1 (delta -49)
67, 82, 97 (delta 15)
15, 48, 81 (delta 33)
Your Answer
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