Question : What is the HCF of 225 and 425?
Option 1: 5
Option 2: 17
Option 3: 25
Option 4: 9
Correct Answer: 25
Solution :
Prime factors of 225 = 3
2
× 5
2
Prime factors of 425 = 5
2
× 17
So, the HCF of 225 and 425 = 5
2
= 25
Hence, the correct answer is 25.
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