Series Completion - Definition, Types, Problems with Solutions

Practice Problems with Solutions:

Direction: 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 and replace the question mark in the given series.

Q.1. 1, 9, 25, 49, ?, 121

(A) 64

(B) 81

(C) 91

(D) 100

So, missing term = 92 = 81.

Q.2. 4, 7, 12, 19, 28, ?

(A) 30

(B) 36

(C) 39

(D) 49

So missing term = 28 + 11 = 39.

Q.3. 11, 13, 17, 19, 23, 25, ?

(A) 26

(B) 27

(C) 29

(D) 37

So, missing term = 25 + 4 = 29.

Q.4. In the series 357, 363, 369, ……., what will be the 10^th term ?

(A) 405

(B) 411

(C) 413

(D) 417

⸫ 10^th term = a + ( 10 – 1) d = a + 9d

   = ( 357 + 9 × 6 ) = ( 357 + 54 ) = 411.

Hence, the answer is (b).

Directions: In each of the following questions, various terms of an alphabet series are given with one or more terms missing as shown by (?). Choose the missing terms out of the given alternatives.

Q.5. R, U, X, A, D, ?

(A) F

(B) G

(C) H

(D) I

Q.6. T, R, P, N, L, ?, ?

(A) J, G

(B) J, H

(C) K, H

(D) K, I

Q.7. B, D, F, I, L, P, ?

(A) R

(B) S

(C) T

(D) U

Directions: In each of the following questions, a letter-number series is given with one or more terms missing as shown by (?). Choose the missing term out of the given alternatives.

Q.8. D–4, F-6, H-8, J-10, ?, ?

(A) K-12, M-13

(B) L-12, M-14

(C) L-12, N-14

(D) K-12, M-14

Q.9. 2B, 4C, 8E, 14H, ?

(A) 16K

(B) 20I

(C) 20L

(D) 22L

Q.10. 3F, 6G, 11I, 18L, ?

(A) 21O

(B) 25N

(C) 25P

(D) 27P

(E) 27Q

 

If you have any concern about this topic, you can ask me anything in the comment section. For practice with solutions, go to the next page.