Question

7*11*13*15+15 is a prime number.is it true?

Answer 1

Answer:

IF WE SOLVE THIS SUM WE GET 15030 SO THIS IS NOT A PRIME NO AS IT IS DIVISIBLE BY 5 ,10..........

Step-by-step explanation:

Answer 2

Answer:

No it is not a prime no.

Step-by-step explanation:

7*11*13*15+15

= 15* (7*11*13+1) = 15*1002                                                                                         the no has factors 15 and 1002 other than 1 and the no itself. So it is a prime number.