Question

The HCF of two numbers is 15 and their LCM is 105. If one of the numbers is 5, the other number is:

• A. \( 75 \)
• B. \( 15 \)
• C. \( 315 \)
• D. \( 525 \)

Hint:

\[ \text{HCF} \times \text{LCM} = \text{Product of two numbers}. \]

Answer 1

The Correct Option is C

Using: \[ \text{HCF} \times \text{LCM} = \text{Product of numbers}. \] \[ 15 \times 105 = 5 \times x. \] \[ x = \frac{15 \times 105}{5} = 3 \]