Question

java从假设有10道题,做对一题得10分,做错一题扣3分,某同学答完10道题得74分,问该同学答对、答错多少题？

Answer 1

public class xx {
public static void main(String args[]) {
int score = 74;
int t = 10;
int f = -3;
for (int i = 0; i <=10; i++) {
for (int j = 1; j < i; j++) {
if(score==t*i+f*j){
System.out.println("对"+i+"错"+j);
break;

}else{
continue;
}
}

}
}
}

Answer 2

x*10-(10-x)*3=74

x=8

Answer 3

做对8个题 做错2个题

Answer 4

public class DoWork {

public static void main(String[] ar) {
int right = 10;
int wrong = -3;
for(int rightI = 01; rightI < 11; rightI++) {
for(int wrongI = 1; wrongI < 11; wrongI++) {
if(right * rightI + wrong * wrongI == 74) {
System.out.println("right: " + rightI + " wrong: " + wrongI);
return;
}
}
}
}
}