The HCF and LCM of two natural numbers are 7 and 84, respectively. If one of the numbers is 7, then the difference between the two numbers is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 77.
HCF × LCM = m × n
According to the question
⇒ m = 7
⇒ HCF = 7
⇒ LCM = 84
Calculation
⇒ 7 × 84 = 7 × n
⇒ n = 84
Hence, the difference between the numbers = 84 - 7 = 77