Question

7 8 12 21 ? 62
a) 42 b) 51 c) 48
d) 35 e) None of these

Answer 1

$add \: \: {1}^{2} , {2}^{2} , {3}^{2} , {4}^{2} , {5}^{2} .... \: to \: \: the \\ previous \: \: term \: \:for \: \: getting \\ next \: \: term \\ \\ so \: \: add \: \: {4}^{2} = 16 \: \: to \: \: 21 \: \: for \: \: getting \\ next \: \: term \\ \\ thus \: \: answer = 16 + 21 = 37 \\ e) \: \: none \: \: of \: \: these$