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Series Test Practice Set

DIRECTIONS (Qs. 1-5): Complete the given series.

दिशानिर्देश (प्रश्न 1-5):दी गई श्रृंखला को पूरा करें।

1. YANWY, DFMBD, IKNGI, NPMLN, (?), XZMVX
A. RUMSR
B. SUNQS
C. UWNSU
D. VUMTV

Answer: Option B
Explanation: Sequence is :
Y → +5 → D → +5 → I → +5 → N → +5 → S → +5 → X
A → +5 → F → +5 → K → +5 → P → +5 → U → +5 → Z
N → -1 → M → +1 → N → -1 → M → +1 → N → -1 → M
W → +5 → B → +5 → G → +5 → L → +5 → Q → +5 → V
Y → +5 → D → +5 → I → +5 → N → +5 → S → +5 → X

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2. QPO, SRQ, UTS, WVU, (?)
A. XVZ
B. YXW
C. ZYA
D. VWX

Answer: Option B
Explanation:Each letter moves +2 steps

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3. YEB, WFD, UHG, SKI, (?)
A. QOL
B. TOL
C. QGL
D. QNL

Answer: Option A
Explanation:1st letter moves –2 steps each time.
2nd letter moves +1, +2, +3, +4 steps respectively.
3rd letter moves +2, +3, steps alternatively.

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4. 28, 33, 31, 36, ? 39
A. 32
B. 34
C. 38
D. 40

Answer: Option B
Explanation:The pattern is +5, –2, +5, –2, …..
So, missing term = 36 –2 = 34.

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5. 165, 195, 255, 285, 345, ?
A. 375
B. 390
C. 420
D. 435

Answer: Option D
Explanation:Each number of the series is 15 multiplied by a prime number i.e. 15 × 11, 15 × 13, 15 × 17, 15 × 19, 15 × 23, …..
So, missing term = 15 × 29 = 435.

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DIRECTIONS (Qs. 6-10): Which sequence of letters when placed at the blanks one after another will complete the given letter series ?

दिशानिर्देश (प्रश्न 6-10): रिक्त स्थान पर दिए गए अक्षरों का अनुक्रम एक दूसरे के बाद दिए गए अक्षर श्रृंखला को पूरा करेगा?

6. b_b_bb_bbb_bb_b
A. bbbbba
B. bbaabb
C. ababab
D. aabaab

Answer: Option C
Explanation:The series is babb/bbab/bbba/bbbb.
Thus, in each sequence, ‘a’ moves one step forward and ‘b’ takes its place and finally in the fourth sequence, it is eliminated.

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