Real Numbers
RD Sharma Ch 01
CBSE_RD_SHARMA_CH01
Grade 10
Question:
If $\text{LCM}(x, 18) = 36$ and $\text{HCF}(x, 18) = 2$, then $x$ is equal to:
$2$
$3$
$4$
$1$
Step-by-Step Solution
Key Concept: $x \times 18 = \text{LCM} \times \text{HCF} = 36 \times 2$.
Stepwise Solution:
$18x = 36 \times 2 = 72 \Rightarrow x = \dfrac{72}{18} = 4$. [1.0 Mark]
Marking Scheme:
• Formula substitution and solving for $x = 4$: 1.0 Mark
Correct Answer: $4$
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