Question

Explain the following are composite numbers are not
i) 7x11x 13+13 (17x11x2)+(7x11x5)​

Answer 1

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.