A product analogy — Aptitude Question
A product analogy: 6 : 42 :: 7 : ? Answer and worked solution on CodeKairo.
- Topic: Analogies & Classification
- Section: Logical Reasoning
- Difficulty: Medium
- Time target: 45 seconds
Question
6 : 42 :: 7 : ?
Options
- 48
- 49
- 56
- 63
Show the answer and the worked solution
Correct answer: C. 56
Worked solution
- 42 = 6 × 7, so the rule is n(n + 1).
- 7 × 8 = 56.
Answer: 56.
The idea
When the result is close to but not equal to n², try n(n + 1) or n(n − 1). Here 49 is offered as the square trap.
Shortcut. 42 = 6² + 6, so the rule is n² + n: 7² + 7 = 49 + 7 = 56.
Common trap. 49 — reading 42 as 6 × 7 with 7 as a fixed multiplier, so 7 × 7; the multiplier is n + 1, which moves on to 8.
All Analogies & Classification questions · placement mock tests