Question

The hcf and lcm of two numbers are 84 and 21 respectively. If the ratio of the two numbers is 1:4, then the larger of the two numbers is?

Answer 1

Answer:

let the numbers are x and 4x

we know hcf ×lcm =product of the two numbers

84×21=x.4x

4x^2=84.21

x^2=84.21/4=21.21

x=21

so the numbers are 21 and 21.4=84

large of the two number is 84