2, 7, 27, 107, 427, ?
ক
1262
খ
1707
গ
4027
ঘ
4207
সঠিক উত্তর: 1707
The pattern is + 5, + 20, + 80, + 320, ...... i.e. + (5 x 12), + (5 x 22), + (5 x 42), + (5 x 82),.....So, missing term = 427 + (5 x 162) = 427 + 1280 = 1707.