Practice MCQ Questions and Answer on Series Completion
151.
Choose the missing terms out of the given alternatives : ajs , gpy , ? , sbk , yhq
(A) dmv
(B) mve
(C) oua
(D) qzi
Solution:
1st letter : a + 6 = g + 6 = m + 6 = s + 6 = y 2nd letter : j + 6 = p + 6 = v + 6 = b + 6 = h 3rd letter : s + 6 = y + 6 = e + 6 = k + 6 = q
152.
2, 3 ,8 , 27, 112, ?
(A) 226
(B) 339
(C) 452
(D) 565
Solution:
The pattern is x 1 + 1, x 2 + 2, x 3 + 3, x 4 + 4,..... So, missing term = 112 x 5 + 5 = 565.
153.
One term in the number series is wrong. Find out the wrong term.
6, 15, 35, 77, 165, 221
(A) 35
(B) 77
(C) 165
(D) 15
Solution:
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.
154.
Choose the missing terms out of the given alternatives.
Z, S, W, O, T, K, Q, G, ?, ?
(A) N, C
(B) N, D
(C) O, C
(D) O, D
Solution:
The given sequence is a combination of two series: I. Z, W, T, Q, ? and II. S, O, k, G, ?
155.
Choose the missing terms out of the given alternatives.
PMT, OOS, NQR, MSQ, ?
(A) LUP
(B) LVP
(C) LVR
(D) LWP
156.
4, 10, ?, 82, 244, 730
(A) 24
(B) 28
(C) 77
(D) 218
Solution:
Each number in the series is 2 less than thrice the preceding number. So, missing number = (10 x 3) - 2 = 28.
157.
One term in the number series is wrong. Find out the wrong term. 0, 2, 3, 5, 8, 10, 15, 18, 24, 26, 35
(A) 18
(B) 24
(C) 26
(D) 10
Solution:
The given sequence is a combination of two series: I. 0, 3, 8, 15, 24, 35 and II. 2, 5, 10, 18, 26 The pattern in both I and II is + 3, + 5, + 7, + 9,..... So, in II, 18 is wrong and must be replaced by (10 + 7) i.e. 17.
158.
1, 2, 3, 6, 9, 18, ?, 54
(A) 18
(B) 27
(C) 36
(D) 81
Solution:
The pattern is x 2, x 3/2, x 2, x 3/2, x 2,..... So, missing term = 18 x 3/2 = 27.
159.
Choose the missing terms out of the given alternatives : M, N, O, L, R, I, V, ?
(A) A
(B) E
(C) F
(D) H
Solution:
The given sequence is a combination of two series:I: M, O, R, V and II: N, L, I, ?The pattern in I is: M + 2 = O + 3 = R + 4 = VThe pattern in II is : N - 2 = L - 3 = I - 4 = ESo, the missing letter is E.
160.
3, 4, 7, 7, 13, 13, 21, 22, 31, 34, ?
(A) 42
(B) 43
(C) 51
(D) 52
Solution:
The given sequence is a combination of two series : I. 3, 7, 13, 21, 31, ? and II. 4, 7, 13, 22, 34 The pattern in I is + 4, + 6, + 8, + 10,..... The pattern in II is + 3, + 6, + 9, + 12,..... So, missing term = 31 + 12 = 43.