Respuesta :
lcm is 630
hcf is 6
since only 3 and 6 fits into all of them but 6 is bigger and asks for highest common factor so 6
hcf is 6
since only 3 and 6 fits into all of them but 6 is bigger and asks for highest common factor so 6
The HCF of 18 42 and 90 is 6, and for the LCM for 18 42 and 90 is 630.