Series & Patterns

11 questions available

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All Number Series 105 Letter Series 4 Alphanumeric Series 11 Missing Terms 3 Pattern Recognition
Showing 1–11 of 11

Q1.Look at this series: F2, _____, D8, C16, B32. What number should fill the blank?

Medium
A G4
B E4
C E3
D None of these
Alphanumeric Series PPSC

Correct Answer: B

Letters decrease alphabetically: F -> E -> D -> C -> B. Numbers double: 2 -> 4 -> 8 -> 16 -> 32. Missing term is E4.

Q2.Which pair comes next in the following series? A, Z, B, Y, _____, _____?

Medium
A V, Z
B C, X
C Y, S
D None of these
Alphanumeric Series PPSC

Correct Answer: B

The series consists of two alternating sequences: first letters go forward (A -> B -> C), and second letters go backward (Z -> Y -> X).

Q3.Find the missing (?) in the series: FHJ, KMO, PRT, ?

Medium
A UVZ
B UXZ
C UVW
D UWY
Alphanumeric Series PPSC

Correct Answer: D

Inside each triad, letters increment by +2 (F-H-J, K-M-O, P-R-T). The first letters of successive triads increment by +5 (F->K->P). Next first letter is P(16) + 5 = U(21). Continuing by +2 yields U-W-Y.

Q4.In the following series, what comes next? 1, A, 9, I, 17, .... ?

Medium
A U
B E
C Q
D Z
Alphanumeric Series PPSC

Correct Answer: C

Numbers increase by +8 (1, 9, 17). Letters correspond to those exact alphabetical positions: A (1st), I (9th), Q (17th). The next letter is therefore Q.

Q5.AB/m, EF/o, ......., MN/s

Medium
A BC/l
B IJ/q
C JK/n
D GH/p
Alphanumeric Series PPSC

Correct Answer: B

The alphabetical pairs increment their first letters by +4: AB -> EF -> IJ -> MN. The letter suffixes after the slash increment by +2: m(13) -> o(15) -> q(17) -> s(19). Thus, IJ/q is the missing term.

Q6.The next term in the series 3C, 5E, 7G, 9I, 11K, is?

Medium
A 12M
B 13M
C 13N
D 14M
Alphanumeric Series PPSC

Correct Answer: B

Numbers increase by +2: 3, 5, 7, 9, 11, 13. Letters skip one each time: C(3), E(5), G(7), I(9), K(11), M(13). So the next term is 13M.

Q7.Which letter precedes the letter which is 13th from D?

Medium
A P
B R
C Q
D S
Alphanumeric Series PPSC

Correct Answer: A

Counting 13 letters forward from D(4) yields Q(17). The letter preceding Q is P(16).

Q8.What is the next term in the sequence: S, U, W, Y, _________?

Medium
A Z
B X
C A
D B
Alphanumeric Series PPSC

Correct Answer: C

The sequence skips one letter: S(19), U(21), W(23), Y(25). Next is A(27, i.e., 1st letter of next cycle).

Q9.What will come next: 7 + 2 - 1 = H, 22 + 6 - 5 = W, 11 + 6 - 2 = ?

Medium
A N
B P
C O
D M
Alphanumeric Series PPSC

Correct Answer: C

The arithmetic sum gives the position in the alphabet: 11+6-2 = 15. The 15th letter of the alphabet is O.

Q10.Complete the series: BC, GC, HN, ___________

Medium
A NI
B FN
C HU
D None of these
Alphanumeric Series PPSC

Correct Answer: C

Following position shifts of first and second letters, HU represents the logical next term.

Q11.Find the odd term in the sequence: A2, C6, E10, G12, I18, ...

Medium
A C6
B A2
C G12
D I18
Alphanumeric Series PPSC

Correct Answer: C

The letter positions are A(1), C(3), E(5), G(7), I(9). The number is position × 2 except G12: A(1*2=2), C(3*2=6), E(5*2=10), I(9*2=18). G should have been G14 instead of G12.