Question : The HCF of three numbers 98, 175, and 210 will be:
Option 1: 6
Option 2: 3
Option 3: 5
Option 4: 7
Correct Answer: 7
Solution :
$98=2\times7\times7$
$175=5\times5\times7$
$210=2\times3\times5\times7$
The common prime factor is 7.
So, the HCF = 7
Hence, the correct answer is 7.
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