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Question

Using Prime Factorisation Method, determine the HCF of the numbers : 40and48


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Solution

First of all lets find the prime factors of both 40,48

240 248
220224
210212
5526
133
1
Prime factors of 40 are 2×2×2×5 Prime factors of 48 are 2×2×2×2×3

Now to find the HCF we need to common factors of both the numbers

which is 2 (which occurs three time in both)

so HCF of 40,48is=2×2×2=8


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