Question
Select the number from the given option that can replace
the question mark (?) in the following series: 18, 19, 23, 32, ?, 73, 109Solution
18 + 1² = 18 + 1 = 19 19 + 2² = 19 + 4 = 23 23 + 3² = 23 + 9 = 32 32 + 4² = 32 + 16 = 48 48 + 5² = 48 + 25 = 73 73 + 6² = 73 + 36 = 109 Â
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