120, 99, 80, 63, 48, ?
Answer: Option A
Explanation:
The pattern is - 21, - 19, - 17, - 15,.....
So, missing term = 48 - 13 = 35.
589654237, 89654237, 8965423, 965423, ?
Answer: Option D
The digits are removed one by one from the beginning and the end in order alternately
so as to obtain the subsequent terms of the series.
3, 10, 101,?
Answer: Option C
Each term in the series is obtained by adding 1 to the square of the preceding term.
So, missing term = (101)2 + 1 = 10202.
In the series 2, 6, 18, 54, ...... what will be the 8th term ?
Answer: Option B
Clearly, 2 x 3 = 6, 6 x 3 = 18, 18 x 3 = 54,.....
So, the series is a G.P. in which a = 2, r = 3.
Therefore 8th term = ar8-1 = ar7 = 2 x 37 = (2 x 2187) = 4374.
125,80,45,20,?
The pattern is - 45, - 35, - 25, .....
So, missing term = 20 - 15 = 5.
