Small cubes — Analogies & Classification Aptitude Question
Small cubes: 2 : 8 :: 3 : ? Answer and worked solution on CodeKairo.
- Topic: Analogies & Classification
- Section: Logical Reasoning
- Difficulty: Easy
- Time target: 30 seconds
Question
2 : 8 :: 3 : ?
Options
- 9
- 12
- 18
- 27
Show the answer and the worked solution
Correct answer: D. 27
Worked solution
- 8 = 2³.
- 3³ = 27.
Answer: 27.
The idea
Nine is offered for anyone who reads the relation as squaring. Checking 2² = 4 against the given 8 rules that out immediately.
Shortcut. 27 is the only perfect cube among the options, and 3³ = 27 matches 2³ = 8.
Common trap. 9 — squaring 3 out of habit; 2² is 4, not 8, so the given pair already rules squaring out.
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