The full score of each test is 100 points, and the average score of Xiaoxin's 4 tests is 90 points. In order to make the average score reach 95 points as soon as possible, how many times should he take the test at least.
每次考试满分100分，小新4次考试平均成绩90分．为了使平均成绩尽快达到95分，他至少还要考多少次．
<result>4</result>