Find the HCF of the following numbers.
(a) 12.28 (b) 30.12 (c) 24,45 (d) 64, 120 (e) 45.72 (f) 658.770
(g) 582, 372 (h) 120, 280 (i) 120.900 (j) 12,30,21 (k) 13, 65, 117 (l) 38,57, 114
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c) Factors of 24 = 1, 2, 3, 4, 6, 8, 12 and 24. Factors of 36 = 1, 2, 3, 4, 6, 9, 12, 18 and 36. Therefore, common factor of 24 and 36 = 1, 2, 3, 4, 6, 8 and 12. Highest common factor (H.C.F) of 24 and 36 = 12.
The HCF means highest common factor, the highest factor of 45 is 45 itself. The prime factorisation of 45 is 3 x 3 x 5.
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