GCAT Number and Letter Sequences 4 — Questions and Answers
Question 1: What number is missing? 2, 6, 18, ___, 162
- 36
- 48
- 54 (Correct answer)
- 72
Correct answer: 54
Each term is multiplied by 3, so 18 × 3 = 54.
Question 2: What letter comes next in the series? Z, W, T, Q, ___
- L
- M
- N (Correct answer)
- O
Correct answer: N
Each letter moves back 3 positions, so Q − 3 = N.
Question 3: Complete the sequence: 1, 8, 27, 64, ___
- 100
- 112
- 120
- 125 (Correct answer)
Correct answer: 125
These are perfect cubes (1³, 2³, 3³, 4³), so the next is 5³ = 125.
Question 4: Which comes next? AZ, BY, CX, DW, ___
- EV (Correct answer)
- EW
- FV
- FU
Correct answer: EV
The first letter advances (A→B→C→D→E) and the second retreats (Z→Y→X→W→V), giving EV.
Question 5: What is missing? 4, 7, 12, 19, 28, ___
- 37
- 38
- 39 (Correct answer)
- 40
Correct answer: 39
Differences increase by 2 each time (+3,+5,+7,+9,+11), so 28 + 11 = 39.
Question 6: Identify the next term: Z1, Y3, X5, W7, ___
- U9
- V8
- V9 (Correct answer)
- U8
Correct answer: V9
The letter decreases one step (Z→Y→X→W→V) and the number increases by 2 (1→3→5→7→9), giving V9.
Question 7: What comes next? 256, 64, 16, 4, ___
- 0
- 1 (Correct answer)
- 2
- 3
Correct answer: 1
Each term is divided by 4 (or multiplied by ¼), so 4 ÷ 4 = 1.
GCAT Number and Letter Sequences 4
What number is missing? 2, 6, 18, ___, 162