Square analogy: 7 : 49 :: 11 : ? — Aptitude Question
Square analogy: 7 : 49 :: 11 : ?: 7 : 49 :: 11 : ? Answer and worked solution on CodeKairo.
- Topic: Analogies & Classification
- Section: Logical Reasoning
- Difficulty: Easy
- Time target: 30 seconds
Question
7 : 49 :: 11 : ?
Options
- 77
- 111
- 121
- 132
Show the answer and the worked solution
Correct answer: C. 121
Worked solution
- 49 = 7².
- 11² = 121.
Answer: 121.
The idea
Test the simple operations in order: square, cube, double, add a constant. Confirm on the given pair before applying it.
Shortcut. Squares of numbers ending in 1 end in 1, which leaves 111 and 121; 121 = 11 × 11.
Common trap. 77 — multiplying 11 by the first term's 7 (reading 49 as 7 × 7 with one 7 fixed) instead of squaring 11.
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