1. CCS Mathematics 12 March 2014
G7/G8 Sheet 1 of revision ( LCM and GCD)
I. ()
Decompose into product of prime factors then calculate the GCD and the LCM of the
following:
1) 360 and 750.
2) 195 and 225.
3) 3600 ; 4050 and 540.
4)
5)
6)
7)
II. ()
1) Find the GCD of the numerator and the denominator of the following fractions:
a) and
b) and
2) Deduce the irreducible form of the fractions in part 1.
III. ()
Calculate and reduce if possible.
(Hint: The common denominator is the LCM of the denominators of the fractions)
1)
2)
3)
4)
5)
GOOD WORK