Question : What is the HCF of 36 and 198?
Option 1: 36
Option 2: 22
Option 3: 18
Option 4: 9
Correct Answer: 18
Solution :
Factors of 36 = 2 × 2 × 3 × 3
Factors of 198 = 2 × 3 × 3 × 11
HCF = 2 × 3 × 3 = 18
Hence, the correct answer is 18.
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