Question

two numbers are 5:7 and h.c.f is 6 then l.c.m what.

Answer 1

let the 2 numbers be 5x and 7x.
their HCF = x , x =6.
then,
two numbers are :
a) 5*6 = 30
b)7*7= 42
LCM OF 30 and 42 = 210.

Answer 2

the number is 30 and 42 so lcm= 210