When positive integer N is divided by positive integer D, the quotient is 16, with a remainder of 7. When N is divided by (D + 2), the quotient is 15 and the remainder is 1. What is the value of N?
Choose the correct choice from the following answers:  A) 151  B) 391  C) 511  D) 691  E) 871
N/D=16 7/D= 16D+7   N/(D+2)=15 1/(D+2)=15D+30+1   solving these two equations   we get D=24 N= 391 answer is 391.
<result>B</result>
When positive integer N is divided by positive integer D, the quotient is 16, with a remainder of 7. When N is divided by (D + 2), the quotient is 15 and the remainder is 1. What is the value of N?