8, 15, 28, 53, ?, 199
ক
101
খ
102
গ
103
ঘ
104
সঠিক উত্তর: 102
Here the series of the form is x2 - 1, x2 - 2, x2 - 3,...
53 x 2 - 4 = 106 - 4 = 102