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Question

Find the HCF of the numbers in each of the following, using the prime factorization method:
1197, 5320, 4389

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Solution

The given numbers are 1197, 5320 and 4389.

We have:

31197 3399 7133 1919 1 25320 22660 21330 5665 7133 1919 1 34389 71463 19209 1111 1
Now, 1197 = 3 × 3× 7× 19 = 32 × 7 × 19
5320 = 2 × 2 × 2× 5 × 7 × 19 = 23 × 5 × 7 × 19
4389 = 3 ×7 × 19 × 11
∴ Required HCF = 19 × 7 = 133

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