Explain the following are composite numbers are not
i) 7x11x 13+13 (17x11x2)+(7x11x5)
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Answer:
17 × 11 × 2 + 17 × 11 × 5
Taking 17 x 11 common in both the terms,
17 × 11 (2 + 5)
17 × 11 × 7
Now, we can clearly see that the number (17 × 11 × 2 + 17× 11 ×5) has three more factors other than 1 and the number itself.
Hence, it is a composite number.
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