If HCF(a,b) = 12, LCM(a,b) = 420, and a < b, then a + b = ?

A 152

B 164

C 176

D 188

Solution

Correct Answer: Option C

*সঠিক উত্তর: c) 176
-a এবং b এর সম্ভাব্য জোড়া হল 84 এবং 92।
তাদের যোগফল 176।If HCF(a,b) = 12, LCM(a,b) = 420, and a < b, then a + b = ? a) 152 b) 164 c) 176 d) 188

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