Find the H C F using prime factorisation method (a) 16 and 60 ( b) 25 and 65 (c) 48 and 120
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a.16= 2×2×2×2=2^4
60=2×2×3×5=2^2×3^1×5^1
LCM = 2^4×3×5
= 16×15
= 240
B. 25=5×5=5^2
65=5×13=5^1×13^1
LCM = 5^2×13^1= 25×65=1625
C. 48=2^4×3^1
120=2^3×3^1×5^1
LCM = 2^4×3^1×5^1
=240
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