High School

The H.C.F. and L.C.M. of two numbers are 12 and 336 respectively. If one of the numbers is 84, the other is
(a) 36
(b) 48
(c) 72
(d) 96

Answer :

Answer:

The Correct Choice is Option (b).

Explanation:

We know that the product of two numbers is equal to the product of their highest common factor (HCF) and least common multiple (LCM).

Given:

HCF = 12

LCM = 336

One number = 84

Let the other number be [tex]\(y\).[/tex]

We have:

[tex]\[ \text{HCF} \times \text{LCM} = \text{Number 1} \times \text{Number 2} \][/tex]

Substituting the given values:

[tex]\[ 12 \times 336 = 84 \times y \][/tex]

[tex]\[ 4032 = 84y \][/tex]

Dividing both sides by 84:

[tex]\[ y = \frac{4032}{84} \][/tex]

[tex]\[ y = 48 \][/tex]

So, the other number is indeed [tex]\( \boxed{48} \).[/tex]