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HCF and LCM — MATHS STD 6 — Question

ICSE BoardEnglish MediumSTD 6MATHSHCF and LCM3 Marks
Question
Using the prime factor method, find the H.C.F. of 40, 60 and 80
✓

Answer

Prime factor of 40 = 2 x 2 x 2 x 5
Prime factor of 60 = 2 x 2 x 3 x 5
Prime factor of 80 = 2 x 2 x 2 x 2 x 5
Common prime factor = 2 x 2 x 5
H.C.F. of 40, 60 and 80 = 2 x 2 x 5 = 20

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