Question : Find the HCF of 240, 280, and 560.
Option 1: 30
Option 2: 10
Option 3: 20
Option 4: 40
Correct Answer: 40
Solution : Given numbers: 240, 280 and 560 240 = 2 × 2 × 2 × 2 × 3 × 5 280 = 2 × 2 × 2 × 5 × 7 560 = 2 × 2 × 2 × 2 × 5 × 7 ⇒ HCF = 2 × 2 × 2 × 5 = 40 Hence, the correct answer is 40.
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