HCF AND LCM

Factor: If a number P divides another number Q exactly, we say that P is a factor of Q i.e. Q is a multiple of P.
H.C.F: The H.C.F of two or more than two numbers is the greatest number that divides each of them exactly.
L.C.M: The least number which is exactly divisible by each one of the given numbers is called their L.C.M
Product of two numbers=Product of their H.C.F and L.C.M
Co-primes: Two numbers are co-primes if their H.C.F is 1.

H.C.F and L.C.M of fractions:

1. H.C.F = H.C.F of Numerators / L.C.M of Denominator

2. L.C.M = L.C.M.of Numerators / H.C.F of Denominator