IMPORTANT FACTS & FORMULAE
Factors and multiples:
If a number divides another number b exactly, we say that a is factor of b. In this case, b is called a multiple of a.
Highest Common Factor (H.C.F):
The H.C.F of two or more than two numbers is the greatest number that divides each of them exactly. H.C.F is also known as Greatest Common Measure (G.C.M) or Greatest Common Divisor (G.C.D). There are two methods of finding the H.C.F of
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