Question : If the LCM of two numbers 260 and 390 is 780, then find the HCF.
Option 1: 140
Option 2: 133
Option 3: 130
Option 4: 120
Correct Answer: 130
Solution :
Given numbers = 260 and 390
LCM = 780
We know,
Multiplication of two numbers = HCF × LCM
⇒ 260 × 390 = 780 × HCF
⇒ HCF = 130
Hence, the correct answer is 130.
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