3, 11, 23, 39, 59, ..
In the series
3, 11, 23, 39, 59, …..
The next term will be
(a) 63
(b) 73
(c) 83
(d) 93
Answer: (c) 83
Explanation:-
3 + 2 x 4 = 3 + 8
= 11,
11 + 3 x 4 = 11 + 12
= 23,
23 + 4 x 4 = 23 + 16
= 39,
39 + 5 x 4 = 39 + 20
= 59,
Same as,
59 + 6 x 4 = 59 + 24
= 83.
Hence, the correct answer is option (c) 83.