In the given series one term is missing. Choose the correct alternative from the given ones that will complete the series.
1, 4, 15, ?, 325, 1956
60
64
75
80
B.
64
0 x 1 + 1 = 1
1 x 2 + 2 = 4
4 x 3 + 3 = 15
15 x 4 + 4 = 64
64 x 5 + 5 = 325
325 x6 + 6 = 1956
