35
38
39
40
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Answer : Option A
Explanation :
The pattern is - 21, - 19, - 17, - 15,.....So, missing term = 48 - 13 = 35.
58965
65423
89654
96542
Answer : Option D
The digits are removed one by one from the beginning and the end in order alternatelyso as to obtain the subsequent terms of the series.
10101
10201
10202
11012
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.
4370
4374
7443
7434
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.
5
8
10
12
The pattern is - 45, - 35, - 25, .....So, missing term = 20 - 15 = 5.
32
64
81
256
The series consists of squares and cubes of consecutive natural numbers i.e. 12, 13, 22, 23, 32, 33, 42, .....So, missing term = 43 = 64.
18
27
36
The pattern is x 2, x 3/2, x 2, x 3/2, x 2,.....So, missing term = 18 x 3/2 = 27.
201
202
203
205
The pattern is x 2 + 1, x 2 - 1, x 2 + 1, x 2 - 1,.....So, missing term = 101 x 2 + 1 = 203.
21
25
33
The pattern is + 1, + 3, + 6,....., i.e. + 1, + (1, + 2), + (1 + 2 + 3),.....So, missing term = 15 + (1 + 2 + 3 + 4) = 25.
37
44
50
55
The sum of any three consecutive terms of the series gives the next term.So, missing number = 8 + 15 + 27 = 50.
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