Question

Find $\left(LCM\text{+}HCF\right)$ of $120\text{and}45$.

• A. 375

Answer 1

The correct option is A 375
$45=3^2\times 5$
$120=2^3\times 3\times 5$
$\therefore HCF(45,120)=3\times 5=15$
And, $LCM(45,120)=2^3\times 3^2\times 5=360$
so, LCM + HCF = 360 + 15 = 375.