Question
What will come in place of the question mark (?) in the
following series? 45, 54, 72, ?, 126, 162Solution
Here, the pattern involves adding multiples of 9 sequentially to each number: 45 + 9 × 1 = 54 54 + 9 × 2 = 72 72 + 9 × 3 = 99 99 + 9 × 4 = 126 126 + 9 × 5 = 162 So, the missing number in place of the question mark is 99.
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