Question
Select the option that is related fifth term in the same
way as the second term is related to the first term and the fourth term is related to the third term: 642: 4 :: 519: 5 :: 888: ?Solution
Second term is one third the sum of all the digits of first term. i.e. Second term = 1/3 × (6 + 4 + 2) = 1/3 × 12 = 4. Fourth term is one third the sum of all the digits of third term. i.e. Fourth term = 1/3 × (5 + 1 + 9) = 1/3 × 15 = 5. Sixth term is one third the sum of all the digits of fifth term, so Sixth term = 1/3 × (8 + 8 + 8) = 1/3 × 24 = 8.
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