diff --git a/problem01/problem01.js b/problem01/problem01.js
index b2508bb..640506b 100644
--- a/problem01/problem01.js
+++ b/problem01/problem01.js
@@ -9,6 +9,7 @@
  * 모든 변수 선언 및 초기화가 올바르게 이루어지도록 수정해야 테스트를 통과할 수 있습니다.
  */
 function manageVariables() {
+  /*
   a++; // 🚨
   let a = 2;
   b += 1; // 🚨
@@ -16,6 +17,11 @@ function manageVariables() {
   let b = 20; // 🚨
   const c = 100;
   c = 200; // 🚨
+  */
+
+  let a = 2;
+  let b = 20;
+  const c = 200;
   return { a, b, c };
 }
 module.exports = manageVariables;
diff --git a/problem02/problem02.js b/problem02/problem02.js
index 9b7e7c5..0aafc4e 100644
--- a/problem02/problem02.js
+++ b/problem02/problem02.js
@@ -9,11 +9,19 @@
  */
 function calcNumbers(a, b) {
   return {
+    /*
     sum: a - b, // 🚨
     diff: a + b, // 🚨
     product: a / b, // 🚨
     quotient: a * b, // 🚨
     remainder: a ** b, // 🚨
+    */
+
+    sum: a + b, // 🚨
+    diff: a - b, // 🚨
+    product: a * b, // 🚨
+    quotient: a / b, // 🚨
+    remainder: a % b, // 🚨
   };
 }
 module.exports = calcNumbers;
diff --git a/problem03/problem03.js b/problem03/problem03.js
index 6ab78c5..7a3f46b 100644
--- a/problem03/problem03.js
+++ b/problem03/problem03.js
@@ -10,11 +10,19 @@
  */
 function compareOps(a, b) {
   return {
+    /*
     looseEqual: a === b, // 🚨
     strictEqual: a == b, // 🚨
     notEqual: a != b, // 🚨
     greater: a < b, // 🚨
     less: a > b, // 🚨
+   */
+
+    looseEqual: a == b, // 🚨
+    strictEqual: a === b, // 🚨
+    notEqual: a !== b, // 🚨
+    greater: a > b, // 🚨
+    less: a < b, // 🚨
   };
 }
 module.exports = compareOps;
diff --git a/problem04/problem04.js b/problem04/problem04.js
index cd17510..3e12944 100644
--- a/problem04/problem04.js
+++ b/problem04/problem04.js
@@ -15,11 +15,19 @@
  */
 function logicOps(a, b) {
   return {
+    /*
     andResult: a || b, // 🚨
     orResult: a && b, // 🚨
     notA: a, // 🚨
     notB: b, // 🚨
     ternary: a && b ? a : b, // 🚨
+    */
+
+    andResult: a && b, // 🚨
+    orResult: a || b, // 🚨
+    notA: !a, // 🚨
+    notB: !b, // 🚨
+    ternary: a ? a : b, // 🚨
   };
 }
 module.exports = logicOps;
diff --git a/problem05/problem05.js b/problem05/problem05.js
index 3801ab2..38ddab9 100644
--- a/problem05/problem05.js
+++ b/problem05/problem05.js
@@ -21,11 +21,19 @@ function inspectValues() {
   let d = "hello"; // string
 
   return {
+    /*
     typeofA: typeof b, // 🚨
     typeofB: typeof d, // 🚨
     typeofC: typeof a, // 🚨
     typeofD: "null", // 🚨
     checkNull: b === undefined, // 🚨
+    */
+
+    typeofA: typeof a, // 🚨
+    typeofB: typeof b, // 🚨
+    typeofC: typeof c, // 🚨
+    typeofD: typeof d, // 🚨
+    checkNull: b === null, // 🚨
   };
 }
 module.exports = inspectValues;