GCAT Number and Letter Sequences 3 — Questions and Answers
Question 1: What is missing? 5, 10, 20, ___, 80, 160
- 30
- 35
- 40 (Correct answer)
- 45
Correct answer: 40
Each term is multiplied by 2, so 20 × 2 = 40.
Question 2: Which letter is next? A, C, F, J, O, ___
- T
- U (Correct answer)
- V
- W
Correct answer: U
The gaps increase by 1 each step (+2, +3, +4, +5, +6), so O + 6 = U.
Question 3: What number fills the blank? 81, 27, 9, 3, ___
- 0
- 1 (Correct answer)
- 2
- 6
Correct answer: 1
Each term is divided by 3, so 3 ÷ 3 = 1.
Question 4: Identify the next term: A1, B2, C3, D4, ___
- E4
- E5 (Correct answer)
- F5
- F6
Correct answer: E5
The letter advances by one and the number increases by one, giving E5.
Question 5: What comes next? 7, 14, 21, 28, 35, ___
- 36
- 40
- 42 (Correct answer)
- 45
Correct answer: 42
These are multiples of 7, so the next term is 7 × 6 = 42.
Question 6: Which letter continues? B, E, H, K, N, ___
- O
- P
- Q (Correct answer)
- R
Correct answer: Q
Each letter skips 2 positions (+3 steps), so N + 3 = Q.
Question 7: What is the next number? 0, 1, 3, 6, 10, 15, ___
- 18
- 20
- 21 (Correct answer)
- 25
Correct answer: 21
These are triangular numbers; differences increase by 1 each time (+1,+2,+3,+4,+5,+6), giving 15 + 6 = 21.
GCAT Number and Letter Sequences 3
What is missing? 5, 10, 20, ___, 80, 160