COOP Test of Sequences 4 — Questions and Answers
Question 1: What number is missing? 3, 9, 27, ___, 243
- 54
- 72
- 81 (Correct answer)
- 108
Correct answer: 81
Each term is multiplied by 3: 3×3=9, 9×3=27, 27×3=81, 81×3=243.
Question 2: What comes next? 50, 45, 40, 35, ___
- 25
- 28
- 30 (Correct answer)
- 32
Correct answer: 30
Each term decreases by 5: 50−5=45, 45−5=40, 40−5=35, 35−5=30.
Question 3: Which letter continues the sequence? Y, W, U, S, ___
- R
- Q (Correct answer)
- P
- O
Correct answer: Q
Each letter moves two places backward in the alphabet: Y, W, U, S, Q.
Question 4: Find the next term: 2, 6, 18, 54, ___
- 108
- 144
- 162 (Correct answer)
- 180
Correct answer: 162
Each term is multiplied by 3: 2×3=6, 6×3=18, 18×3=54, 54×3=162.
Question 5: What is missing? 10, 20, ___, 80, 160
- 30
- 35
- 40 (Correct answer)
- 50
Correct answer: 40
Each term is doubled: 10×2=20, 20×2=40, 40×2=80, 80×2=160.
Question 6: Complete the letter sequence: A, Z, B, Y, C, ___
- D
- W
- X (Correct answer)
- V
Correct answer: X
The pattern alternates: letters from the start (A,B,C…) and end (Z,Y,X…) of the alphabet.
Question 7: What number comes next? 1, 3, 7, 15, 31, ___
- 47
- 55
- 63 (Correct answer)
- 65
Correct answer: 63
Each term is doubled and then 1 is added: 31×2+1=63.
COOP Test of Sequences 4
What number is missing? 3, 9, 27, ___, 243