Update exercises

chapter5/exercises

@@ -33,7 +33,7 @@ let total = prompt('How many digits in the number?');
 let max = 5; 
 total = Number(total); 
 for (let x = 0; x < total; x++) { 
-    const ranNumber = Math.floor(Math.random() * max) + 1;
+    const ranNumber = Math.floor(Math.random() * (max + 1))  ;
     tempNum += ranNumber; 
 } 
 console.log(tempNum);