GCAT Number and Letter Sequences 5 — Questions and Answers
Question 1: What number is next? 3, 9, 27, 81, ___
- 162
- 243 (Correct answer)
- 256
- 324
Correct answer: 243
Each term is multiplied by 3 (powers of 3), so 81 × 3 = 243.
Question 2: Which letter continues? C, F, I, L, O, ___
- P
- Q
- R (Correct answer)
- S
Correct answer: R
Each letter advances 3 positions, so O + 3 = R.
Question 3: What is missing? 50, 44, 38, 32, ___, 20
- 24
- 26 (Correct answer)
- 28
- 30
Correct answer: 26
Each term decreases by 6, so 32 − 6 = 26.
Question 4: Complete this alternating sequence: 2, A, 4, C, 6, E, 8, ___
- F
- G (Correct answer)
- H
- I
Correct answer: G
The letters follow every other letter of the alphabet (A, C, E, G…), so the next letter is G.
Question 5: What number comes next? 1, 2, 4, 7, 11, 16, ___
- 20
- 21
- 22 (Correct answer)
- 23
Correct answer: 22
Differences increase by 1 each step (+1,+2,+3,+4,+5,+6), so 16 + 6 = 22.
Question 6: Which pair comes next? AA, CC, EE, GG, ___
- HH
- II (Correct answer)
- JJ
- KK
Correct answer: II
Each pair skips one letter (+2 positions), so after GG comes II.
Question 7: What is the next number? 1000, 500, 250, 125, ___
- 60
- 62.5 (Correct answer)
- 63
- 65
Correct answer: 62.5
Each term is halved, so 125 ÷ 2 = 62.5.
GCAT Number and Letter Sequences 5
What number is next? 3, 9, 27, 81, ___