Question

4. Explain why 7 x 11 x 13+13
numbers.
ain why 7 x 11 x 13 + 13 and 7 x 6 x 5 x 4 x 3 x 2 x 1 + 5 are composite
5. How will you
ow that (17x112
+ (17 y 11 Y 5) is a composite number?​

Answer 1

Answer:

7 x 11 x 13+13

take 13 comman

13(7x11x1+1)

13 x 77 x 1 +1

13 x 78x 1

It has more than 2 factors so it is composite Number..

same other one..

Step-by-step explanation:

please follow me

Answer 2

Solution:-

$7 \times 11 \times 13 + 13$

We will take 13 as common.

$(7 \times 11 \times 1 + 1)13 \\ = 78 \times 13$

$7 \times 11 \times 13 + 13$ has more than 2 factors. So, it is a composite number.

Now,

$7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1 + 5$

We will take 5 as common.

$(7 \times 6 \times 1 \times 4 \times 3 \times 2 \times 1 + 1)5 \\ = 1009 \times 5$

So, $7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1 + 5$has also more than 2 factors.

So, it is a composite number.

Thank You.