Mensa Mensa IQ Sequence Completion 5 — Questions and Answers
Question 1: What comes next in the sequence: 2, 3, 5, 7, 11, 13, ___?
- 14
- 15
- 17 (Correct answer)
- 19
Correct answer: 17
These are consecutive prime numbers, and the next prime after 13 is 17.
Question 2: Find the next term: 5, 10, 20, 40, 80, ___?
- 100
- 120
- 140
- 160 (Correct answer)
Correct answer: 160
Each term is multiplied by 2, so 80 × 2 = 160.
Question 3: Complete the sequence: 3, 8, 15, 24, 35, ___?
- 44
- 46
- 48 (Correct answer)
- 50
Correct answer: 48
The pattern is n² − 1 (3=2²−1, 8=3²−1, …), so the next is 7²−1 = 48.
Question 4: What is the next letter group: AB, DE, GH, JK, ___?
- LM
- MN (Correct answer)
- NM
- MO
Correct answer: MN
Each pair skips one letter of the alphabet (AB, skip C, DE, skip F, GH, skip I, JK, skip L, MN).
Question 5: Find the missing value: 2, 6, 18, 54, ___?
- 108
- 144
- 162 (Correct answer)
- 216
Correct answer: 162
Each term is multiplied by 3, so 54 × 3 = 162.
Question 6: What comes next: 1, 8, 27, 64, 125, ___?
- 196
- 210
- 216 (Correct answer)
- 225
Correct answer: 216
These are perfect cubes (1³, 2³, 3³, 4³, 5³), so the next is 6³ = 216.
Question 7: What is the next number: 4, 7, 13, 25, 49, ___?
- 91
- 95
- 97 (Correct answer)
- 99
Correct answer: 97
Each term is approximately doubled then decreased by 1 (4→7: ×2−1, 7→13: ×2−1, 13→25: ×2−1, 25→49: ×2−1, so 49×2−1=97).
Mensa Mensa IQ Sequence Completion 5
What comes next in the sequence: 2, 3, 5, 7, 11, 13, ___?