Practice MCQ Questions and Answer on Series Completion
81.
Choose the missing terms out of the given alternatives :1st letter : Z, S, 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,, ? The pattern in I is: Z - 3 = W - 3 = T - 3 = Q - 3 = N The pattern in II is : S - 4 = O - 4 = K - 4 = G - 4 = C
82.
11, 13, 17, 19, 23, 25, ?
(A) 26
(B) 27
(C) 29
(D) 37
Solution:
The pattern is + 2, + 4, + 2, + 4, ..... So, missing term = 25 + 4 = 29.
83.
Choose the missing terms out of the given alternatives : a, d, c, f, ? , h, g, ? , i
(A) e, j
(B) e, k
(C) f, j
(D) j, e
Solution:
a + 3 = d - 1 = c + 3 = f - 1 = e + 3 = h - 1 = g + 3 = j - 1 = i
84.
2, 2, 5,13, 28, ?
(A) 49
(B) 50
(C) 51
(D) 52
Solution:
The pattern is + 0, + 3, + 8, + 15, ..... i.e. + (l2 - 1), + (22 - 1), + (32 - 1), + (42 - 1), ..... So, missing term = 28 + (52 - 1) = 28 + 24 = 52.
85.
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, ?
86.
Choose the missing terms out of the given alternatives.
AYD, BVF, DRH, ?, KGL
(A) FMI
(B) GMJ
(C) GLJ
(D) HLK
87.
198, 194, 185, 169, ?
(A) 92
(B) 112
(C) 136
(D) 144
Solution:
The pattern is - 4, - 9, - 16,.....i.e. - 22, - 32, - 42,..... So, missing pattern = 169 - 52 = 169 - 25 = 144.
88.
Find the term which does not fit into the series: 1CC, 5FU, 9IT, 15LS, 17OR
(A) 5FU
(B) 15LS
(C) 9IT
(D) 17OR
Solution:
1st letter :1 + 4 = 5 + 4 = 9 + 4 = 13 + 4 = 17 2nd letter :C + 3 = F + 3 = I + 3 = L + 3 = O 3rd letter :V - 1 = U - 1 = T - 1 = S - 1 = R Thus, the term 15LS is wrong and must be replaced by 13LS.
89.
Choose the missing terms out of the given alternatives.
b e d f ? h j ? l
(A) i m
(B) m i
(C) i n
(D) j m
Solution:
The series may be divided into groups as shown: b e d / f ? h / j ? l Clearly in the first group, the second and third letters are respectively three and two steps ahead of the first letter. A similar pattern would follow in the second and third groups.
90.
One term in the number series is wrong. Find out the wrong term.
8, 13, 21, 32, 47, 63, 83
(A) 13
(B) 21
(C) 32
(D) 47
Solution:
The correct pattern is + 5, + 8, + 11, + 14,..... So, 47 is wrong and must be replaced by (32 + 14) i.e. 46.