The given sequence is a combination of three series :
I. 1st, 4th, 7th, 10th terms i.e. 8, 7, 6, ?
II. 2nd, 5th, 8th, 11th terms i.e. 9, 10, 11, 12
III. 3rd, 6th, 9th terms i.e. 8, 9, 10 The pattern in I is - 1.
So, missing term = 6 - 1 = 5.
Question 2 of 20
Hint
10, 14, 26, 42, 70, ?
SOLUTION ANALYSIS
Correct Option: D
Each term in the series, except the first two terms, is 2 more than the sum of the preceding two terms.
So, missing term = (42 + 70) + 2 = 114.
Question 3 of 20
Hint
45, 54, 47, ?, 49, 56, 51, 57, 53
SOLUTION ANALYSIS
Correct Option: C
The given sequence is a combination of two series:
I. 45, 47, 49, 51, 53 and II. 54, ?, 56, 57
Clearly, II consists of consecutive natural numbers, starting from 54.
So, missing term = 55.
Question 4 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 1, 2, 4, 8, 16, 32, 64, 96
SOLUTION ANALYSIS
Correct Option: D
Each term of the series is obtained by multiplying the preceding term by 2.
So, 96 is wrong and must be replaced by (64 x 2) i.e. 128.
Question 5 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 8, 13, 21, 32, 47, 63, 83
SOLUTION ANALYSIS
Correct Option: D
The correct pattern is + 5, + 8, + 11, + 14,.....
So, 47 is wrong and must be replaced by (32 + 14) i.e. 46.
Question 6 of 20
Hint
4, 10, ?, 82, 244, 730
SOLUTION ANALYSIS
Correct Option: B
Each number in the series is 2 less than thrice the preceding number.
So, missing number = (10 x 3) - 2 = 28.
Question 7 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 6, 15, 35, 77, 165, 221
SOLUTION ANALYSIS
Correct Option: C
The terms of the series are products of two consecutive prime numbers i.e. (2 x 3),
(3 x 5), (5 x 7), (7 x 11),.....
So, 165 is wrong and must be replaced by (11 x 13) i.e. 143.
Question 8 of 20
Hint
4, 7, 12, 19, 28, ?
SOLUTION ANALYSIS
Correct Option: C
The pattern is + 3, + 5, + 7, + 9, .....
So, missing term = 28 + 11 = 39.
Question 9 of 20
Hint
3, 7, 15, ?, 63, 127
SOLUTION ANALYSIS
Correct Option: B
Each number in the series is one more than twice the preceding number.
So, missing term = (15 x 2) + 1 = 31.
Question 10 of 20
Hint
6, 13,28,59,?
SOLUTION ANALYSIS
Correct Option: D
1st number : 6
2nd number : 6 X 2 +1 = 13
3rd number : 13 X 2 + 2 = 28
4th number : 28 X 2 + 3 = 59
therefore
5th number : 59 x 2 + 4 = 122
Question 11 of 20
Hint
4, 12, 36, 108, ?
SOLUTION ANALYSIS
Correct Option: D
The pattern is x 3.
So, missing term = 108 x 3 = 324.
Question 12 of 20
Hint
Which term of the series 5, 8, 11, 14,.....is 320?
SOLUTION ANALYSIS
Correct Option: C
Clearly, 5 + 3 = 8, 8 + 3 = 11, 11 + 3 = 14, .....
So, the series is an A.P. in which a - 5 and d = 3.
Let 320 be the nth term of the series.
Then, 320 = 5 + (n - 1) x 3 or (n - 1) = 105 or n = 106.
Question 13 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 121, 143, 165, 186, 209
SOLUTION ANALYSIS
Correct Option: C
Each term in the series is obtained by adding 22 to the preceding term.So, 186 is wrong and must be replaced by (165 + 22) i.e. 187.
Question 14 of 20
Hint
8, 28, 116, 584, ?
SOLUTION ANALYSIS
Correct Option: D
The pattern is x 3 + 4, x 4 + 4, x 5 + 4,.....
So, missing term = 584 x 6 + 4 = 3508.
Question 15 of 20
Hint
1, 5, 13,25,41,?
SOLUTION ANALYSIS
Correct Option: C
The pattern is + 4, + 8, + 12, + 16......
So, missing term = 41 + 20 = 61.
Question 16 of 20
Hint
10, 18, 28, 40, 54, 70, ?
SOLUTION ANALYSIS
Correct Option: D
The pattern is + 8, + 10, + 12, + 14, .....
So, missing term = 70 + 18 = 88.
Question 17 of 20
Hint
3, 8, 13, 24, 41, ?
SOLUTION ANALYSIS
Correct Option: A
The pattern followed is : nth term + (n + l)th term + (n + 1) = (n + 2)th term.
Thus, 1st term + 2nd term + 2 = 3rd term; 2nd term + 3rd term + 3 = 4th term and so on.
So, missing term = 6th term = 4th term + 5th term + 5 = 24 + 41 + 5 = 70.
Question 18 of 20
Hint
325, 259, 204, 160, 127, 105, ?
SOLUTION ANALYSIS
Correct Option: A
The pattern is - 66, - 55, - 44, - 33, - 22, .....
So, missing term = 105 - 11 = 94.
Question 19 of 20
Hint
5760, 960, ?, 48, 16, 8
SOLUTION ANALYSIS
Correct Option: C
The pattern is ÷ 6, ÷ 5, ÷ 4, ÷ 3, ÷ 2.
So, missing term = 960 - 5 = 192.
Question 20 of 20
Hint
One term in the number series is wrong. Find out the wrong term. 3, 4, 10, 32, 136, 685, 4116
SOLUTION ANALYSIS
Correct Option: B
The correct pattern is x 1 + 1, x 2 + 2, x 3 + 3, x 4 + 4,.....
So, 32 is wrong and must be replaced by (10 x 3 + 3) i.e. 33.
