Practice Questions: Alphanumeric Series | IBPS PO Prelims & Mains Preparation - Bank Exams PDF Download

Introduction

Alphanumeric series questions are a key part of the reasoning section in bank exams like IBPS PO, SBI Clerk, and RBI Assistant. These questions test your ability to identify patterns in sequences containing letters, numbers, or a mix of both.

Here are 10 practice questions with solutions to help you master alphanumeric series problems.

Practice Questions

1. Complete the series:

A2, C4, E6, G8, ?
Options:
(a) H10
(b) I10
(c) J10
(d) K10

Answer: (b) I10
Explanation:

• Letters: A (+2) → C (+2) → E (+2) → G (+2) → I

• Numbers: 2 (+2) → 4 (+2) → 6 (+2) → 8 (+2) → 10

2. Find the missing term:

3F, 6G, 11I, 18L, ?
Options:
(a) 27P
(b) 25O
(c) 27O
(d) 25P

Answer: (a) 27P
Explanation:

• Numbers: 3 (+3) → 6 (+5) → 11 (+7) → 18 (+9) → 27

• Letters: F (+1) → G (+2) → I (+3) → L (+4) → P

3. What comes next?

Z1A, Y4D, X9G, W16J, ?
Options:
(a) V25M
(b) U25M
(c) V25N
(d) U25N

Answer: (a) V25M
Explanation:

• Letters (Backward): Z (-1) → Y (-1) → X (-1) → W (-1) → V

• Numbers: 1 (1²), 4 (2²), 9 (3²), 16 (4²), 25 (5²)

• Letters (Forward): A (+3) → D (+3) → G (+3) → J (+3) → M

4. Complete the series:

B3E, D5H, F9K, H17N, ?
Options:
(a) J33Q
(b) I33Q
(c) J31Q
(d) I31Q

Answer: (a) J33Q
Explanation:

• First Letters: B (+2) → D (+2) → F (+2) → H (+2) → J

• Numbers: 3 (×2 -1) → 5 (×2 -1) → 9 (×2 -1) → 17 (×2 -1) → 33

• Last Letters: E (+3) → H (+3) → K (+3) → N (+3) → Q

5. Find the missing term:

2A, 4C, 8E, 16G, ?
Options:
(a) 24I
(b) 32H
(c) 32I
(d) 24H

Answer: (c) 32I
Explanation:

• Numbers: 2 (×2) → 4 (×2) → 8 (×2) → 16 (×2) → 32

• Letters: A (+2) → C (+2) → E (+2) → G (+2) → I

6. What comes next?

K12, M10, O8, Q6, ?
Options:
(a) S4
(b) R4
(c) S5
(d) R5

Answer: (a) S4
Explanation:

• Letters: K (+2) → M (+2) → O (+2) → Q (+2) → S

• Numbers: 12 (-2) → 10 (-2) → 8 (-2) → 6 (-2) → 4

7. Complete the series:

1P, 4R, 9U, 16Y, ?
Options:
(a) 25C
(b) 25D
(c) 24C
(d) 24D

Answer: (a) 25C
Explanation:

• Numbers: 1 (1²), 4 (2²), 9 (3²), 16 (4²), 25 (5²)

• Letters: P (+2) → R (+3) → U (+4) → Y (+5) → C

8. Find the missing term:

A1Z, B4X, C9V, D16T, ?
Options:
(a) E25R
(b) F25R
(c) E25S
(d) F25S

Answer: (a) E25R
Explanation:

• First Letters: A (+1) → B (+1) → C (+1) → D (+1) → E

• Numbers: 1 (1²), 4 (2²), 9 (3²), 16 (4²), 25 (5²)

• Last Letters: Z (-2) → X (-2) → V (-2) → T (-2) → R

9. What comes next?

5D, 7F, 10H, 14J, ?
Options:
(a) 19L
(b) 18L
(c) 19K
(d) 18K

Answer: (a) 19L
Explanation:

• Numbers: 5 (+2) → 7 (+3) → 10 (+4) → 14 (+5) → 19

• Letters: D (+2) → F (+2) → H (+2) → J (+2) → L

10. Complete the series:

W5, T8, Q11, N14, ?
Options:
(a) K17
(b) J17
(c) K16
(d) J16

Answer: (a) K17
Explanation:

• Letters (Backward): W (-3) → T (-3) → Q (-3) → N (-3) → K

• Numbers: 5 (+3) → 8 (+3) → 11 (+3) → 14 (+3) → 17

Tips for Solving Alphanumeric Series

1. Separate letters and numbers to analyze patterns individually.

2. Look for arithmetic progressions (+, -, ×, ÷) in numbers.

3. Check letter shifts (A→C = +2, Z→X = -2).

4. Watch for square/cube patterns (1, 4, 9, 16 = 1², 2², 3², 4²).

5. Practice daily to improve speed and accuracy.