Question

Lcm of 2 numbers is 120 and hcf is 10 what is the sum.of those two numbers

Answer 1

Your answer will be 70.

Explanation

Numbers = 10x and 10y

Where x and y are prime to each other.

∴LCM = 10xy

=>10xy= 120 =>xy=12

Possible pair = (3, 4)

∴Sum of numbers

= 10×3+10×4=70

[As x and y are prime to each other]

HOPE IT HELPS YOU ❤

Answer 2

Given

Let 10a and 10b the two numbers where a and b are coprimes.

LCM OF TWO NUMBERS = 120

HCF=10

LCM OF 10 A B =120

ab =12

Therefore possible pairs could be

3,4 or 1,12

Hence, number can be 30 and 40 and there sum is 70

Hence, option d is correct...