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Series Test Practice Set

13. 1944, 108, ?, 6, 3
A. 16
B. 18
C. 11
D. 12

Answer: Option B
Explanation: 6 × 3 = 18
18 × 6 = 108
108 × 18 = 1944
Hence, 18 is the missing number in the sequence.

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14. 354 (110) 526
297 (?) 2631
A. 128
B. 116
C. 135
D. 143

Answer: Option B
Explanation:354 + 526 = 880/8 =110
→ 297 +631 = 923/8 = 116

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15. 2, 5, 10, 19, 36, ?
A. 70
B. 71
C. 68
D. 69

Answer: Option D
Explanation:2 → 2×2-1 → 5 → 3×2-1 → 10 → 5×2-1 → 19 → 9×2-1 → 36 → 17×2-1 → 69

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DIRECTIONS (Qs. 16-20) : In the following questions a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.

दिशानिर्देश (प्रश्न 16-20): निम्नलिखित प्रश्नों में एक श्रृंखला दी गयी है जिसमें एक शब्द गायब है। दिए गए विकल्पों में से सही विकल्प चुनें जो श्रृंखला को पूरा करेंगे।

16. BCFG, JKNO, RSVW, ?
A. ZADE
B. HIKL
C. STUX
D. MNPQ

Answer: Option A
Explanation:B C F G → 2, 3, 6, 7
J K N O → 10, 11, 14, 15
R S V W → 18, 19, 22, 23
Next sequence = 26, 27, 30, 31 = 26, 1, 4, 5 = Z A D E
(subtract the excess value by 26)

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17. CIM, HNR, MSW, ?
A. SXA
B. UYB
C. RXB
D. ZEH

Answer: Option C
Explanation:

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18. 2, 3, 6, 7, 14, 15, ?
A. 16
B. 30
C. 31
D. 32

Answer: Option B
Explanation:2 → +1 → 3 → ×2 → 6 → +1 → 7 → ×2 → 14 → +1 → 15 → ×2 → 30

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