Question

SAT数学题目

if n and p are intergers greater than 1 and if p is a factor of both n+3.what is the value of p?

答案是 10 ，为什么？
这是原题！

Answer 1

楼主题目有错
题目：If n and p are integers greater than 1 and if p is a factor of both n +3 and n +10, what is the value of p ?

解答：if p is a factor of n+3 and n+10 then;

p*x=n+3 and p*y=n+10 where x and y are natural numbers;

then; p*y-p*x=n+10 -(n+3) => p*(y-x)=7;

Since 7 has only two factors 1 and 7; p can either be 1 or 7.

Since p>1 p=7.

Answer 2

如果 n 和 p 是整数，且大于1。如果 p 是一个 n 与 3 的因子，那么求 p 的值。我想了半天只能这么翻译，但是里面有好几处语法错误，请问这是原题吗？