Series (SSC CHSL 2020 Tier – 1)

Total Questions: 16

1. a _ _ gb _ _ acegb _ _ aceg _ _ _ [S.S.C CHSL 12/04/2021 (Morning)]

Correct Answer: (b) cedfdfbdf
Solution:The pattern followed here is :

cedfdfbdf → acegbdf / acegbdf / acegbdf

Hence, "cedfdfbdf" is the correct answer.

2. 2, 4, 5, 19, 71, ? [S.S.C CHSL 12/04/2021 (Morning)]

Correct Answer: (a) 361
Solution:The pattern followed here is :

{(2 × 1) + 2} = 4

{(4 × 2) - 3} = 5

{(5 × 3) + 4} = 19

{(19 × 4) - 5} = 71

{(71 × 5) + 6} = 361

Hence, "361" is the correct answer.

3. 10, 13, 19, 31, ?, 103 [S.S.C CHSL 12/04/2021 (Afternoon)]

Correct Answer: (d) 55
Solution:The pattern followed here is :

Hence, "55" is the correct answer.

4. REST, SEST, SFST, ?, SFTU [S.S.C CHSL 12/04/2021 (Afternoon)]

Correct Answer: (d) SFTT
Solution:The pattern followed here is :

Hence, "SFTT" is the correct answer.

5. KO _ MCL _ QMCMO _ M _ NOQ _ C [S.S.C CHSL 13/04/2021 (Afternoon)]

Correct Answer: (d) Q, O, Q, C, M
Solution:The pattern followed here is :

The repetitive unit is KOQMC, but the first letter increases by 1 each time.

Q, O, Q, C, M → KOQMC / LOQMC / MOQMC / NOQMC

Hence, "Q, O, Q, C, M" is the correct answer.

6. Y _ BP _ _ A _ PK _ AB _ KY _ BPK [S.S.C CHSL 13/04/2021 (Evening)]

Correct Answer: (c) A K Y B Y P A
Solution:The pattern followed here is :

The repetitive series is ‘YABPK’
A K Y B Y P A → YABPK / YABPK / YABPK / YABPK

Hence, "A K Y B Y P A" is the correct answer.

7. 12, 15, 75, ?, 738, 749 [S.S.C CHSL 13/04/2021 (Evening)]

Correct Answer: (b) 82
Solution:The pattern followed here is :

Hence, "82" is the correct answer.

8. 23, 29, 31, 37, 41, 43, 47, ? [S.S.C CHSL 15/04/2021 (Morning)]

Correct Answer: (c) 53
Solution:The pattern followed here is :

This is a sequence of prime numbers beginning with 23.

The next prime number will be 53.

Hence, "53" is the correct answer.

9. 45, 49, 57, ?, 105, 169 [S.S.C CHSL 16/04/2021 (Afternoon)]

Correct Answer: (b) 73
Solution:The pattern followed here is :

Hence, "73" is the correct answer.

10. 14, 28, 31, 124, 129, ? [S.S.C CHSL 16/04/2021 (Evening)]

Correct Answer: (a) 774
Solution:The pattern followed here is :

Hence, "774" is the correct answer.