Question 58
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What is the least natural number x for which √(18 × 14 × x) is an integer?
- A 7 Correct
- B 14
- C 2
- D 3
Correct Answer: Option A
18 × 14 = 252 = 2² × 3² × 7
Only 7 is unpaired
x = 7 → 252 × 7 = 1,764 = 42²
Answer: 7
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