Question

Find 7*11*13+13 is an composite no. ( Note: (*) this is the sign of multiplication

Answer 1

Answer:

By fundamental theorem of arithmetic ,given number is a composite number

Answer 2

There are 13 as a common factor. We can use the opposite of distributive property, which is factorizing.

→ 7*11*13 + 13

→ (7*11)*13 + 13

→ 77*13 + 13

→ 78*13

→ Furthermore, 2*3*13²

Now we clearly see that it is a composite number.