5, 4, 10, 27, 77, 380
6 A B C D E
What will be come in place of D ?
Answer & ExplanationOption: [B]
The pattern is x 1 - 1, x 2 - 2, x 3 - 3, x 4 - 4, x 5 - 5
So, 6 x 1 - 1 = 5
So, 5 x 2 - 2 = 8
So, 8 x 3 - 3 = 21
So, 21 x 4 - 4 = 80 which replaces D
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