In each of the following questions, a number series is given with one term missing. Choose the correct alternative that will continue the same pattern.
3, 10, 101,?
Answer: C
Explanation:Each term in the series is obtained by adding 1 to the square of the preceding term.So, missing term = (101)2 + 1 = 10202
Enter details here
In the series 2, 6, 18, 54, …… what will be the 8th term ?
Answer: B
Explanation: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.
Enter details here
125,80,45,20,?
Answer: A
Explanation:The pattern is – 45, – 35, – 25, …..So, missing term = 20 – 15 = 5.
Enter details here
10, 100, 200, 310, ?
Answer: D
The pattern is + 90 + 100, + 110,.....
So, missing term = 310 + 120 = 430.
Enter details here
28, 33, 31, 36, ?, 39
Answer: B
Explanation:
The pattern is + 5, - 2, + 5, - 2,.....
So, missing term = 36 - 2 = 34.
Enter details here
1, 9, 25, 49, 81, ?
Answer: C
Explanation:
The series consists of squares of consecutive odd number
So, missing term = square of 11 = 121.
Enter details here
1, 9, 25, 49, ?, 121
Answer: B
Explanation:
The given series consists of squares of consecutive odd numbers
So, missing term = square of 9 = 81.
Enter details here
1, 1, 4, 8, 9, 27, 16, ?
Answer: B
Explanation:The series consists of squares and cubes of consecutive natural numbers So, missing term = cube of 4
Enter details here
1, 2, 3, 6, 9, 18, ?, 54
Answer: B
Explanation:The pattern is x 2, x 3/2, x 2, x 3/2, x 2,…..So, missing term = 18 x 3/2 = 27
Enter details here
6, 13, 25, 51, 101, ?
Answer: C
Explanation:The pattern is x 2 + 1, x 2 – 1, x 2 + 1, x 2 – 1,…..So, missing term = 101 x 2 + 1 = 203.
Enter details here