Question

answer the question above ​

Answer 1

13 x 23 x 29 + 13

all the numbers are odd prime

we know that product of two odd numbers is always odd.

so product of 13 and 23 will be an odd number and product of the result and 29 will also be an odd number

again, sum of two odd number is always an even number

so sum of 13 x 23 x 29 and 13 will be even number.greater than two

since even number greater than two are divisible by 2 and hence a composite number.

so 13 x 23 x 29 + 13 is a composite number

Answer 2

Answer:

13x23x29+13

13(23x29+1)

13(667+1)

13x668

13x2x2x167

Since it can be written as the product of prime numbers,its a composite number!Hope it helps......