Question
What will come in place of the question mark (?) in the
following series? 2.5, 6.5, 18.5, 54.5, 162.5, 486.5, ?Solution
2.5 × 3 – 1 = 6.5 6.5 × 3 – 1 = 18.5 18.5 × 3 – 1 = 54.5 54.5 × 3 – 1 = 162.5 162.5 × 3 – 1 = 486.5 486.5 × 3 – 1 = 1458.5
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