10, 100, 200, 310, ?
Answer: Option D
Explanation:
The pattern is + 90 + 100, + 110,.....
So, missing term = 310 + 120 = 430.
11, 10, ?, 100, 1001, 1000, 10001
Answer: Option A
The pattern is - 1, x 10 + 1, - 1, x 10 + 1, - 1, x 10 + 1, .....
So, missing term = 10 x 10 + 1 = 101.
2, 7, 27, 107, 427, ?
Answer: Option B
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.
