Question

The lcm of two coprime Number is 420.If one of them is 28,find the other.​

Answer 1

Step-by-step explanation:

The two numbers which have only 1 as their common factor are called co-primes.

For example, Factors of 5 are 1,5

Factors of 3 are 1,3

Common factors is 1.

So they are co-prime numbers.

To find their LCM, we

then choose each prime number with the greatest power and multiply them to get the LCM.

=>LCM=3×5=15

Hence, LCM of two co-prime numbers is their product.

Answer 2

Step-by-step explanation:

product if the coprimes is only their lcm ,then lcm=420 and one of the coprime =28,then let other coprime=x there fore 28×x=420,x=420/28 ,x=15. there fore the other coprime is 15