diff --git "a/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/1.js" "b/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/1.js"
new file mode 100644
index 00000000..5f6fed9b
--- /dev/null
+++ "b/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/1.js"
@@ -0,0 +1,8 @@
+function solution(s) {
+    if (s.length !== 4 && s.length !== 6) 
+        return false;
+    for (let i = 0; i < s.length; i++) {
+      if (isNaN(Number(s[i]))) return false;
+    }
+    return true;
+  }
\ No newline at end of file
diff --git "a/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/2.js" "b/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/2.js"
new file mode 100644
index 00000000..2e34740f
--- /dev/null
+++ "b/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/2.js"
@@ -0,0 +1,7 @@
+function solution(left, right) {
+    let answer = 0;
+    
+    for(let i = left; i <= right; i++){
+        Math.sqrt(i) % 1 === 0 ? answer += i : answer -= i;
+    } return -answer
+}
\ No newline at end of file
diff --git "a/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/3.js" "b/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/3.js"
new file mode 100644
index 00000000..44698723
--- /dev/null
+++ "b/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/3.js"
@@ -0,0 +1,8 @@
+function solution(price, money, count) {
+    let total = 0;
+    
+    for(let i = 0; i <= count; i++){
+        total += price * i
+    }
+    return total > money ? total - money : 0;
+}
\ No newline at end of file
diff --git "a/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/4.js" "b/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/4.js"
new file mode 100644
index 00000000..b3d708e3
--- /dev/null
+++ "b/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/4.js"
@@ -0,0 +1,10 @@
+function solution(arr1, arr2) {
+    let answer = [];
+    for(let i = 0; i < arr1.length; i++){
+        answer[i] = [];
+        for(let j = 0; j < arr1[i].length; j++){
+            answer[i].push(arr1[i][j] + arr2[i][j])
+        }
+    }
+    return answer;
+}
\ No newline at end of file
diff --git "a/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/5.js" "b/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/5.js"
new file mode 100644
index 00000000..f8d779bb
--- /dev/null
+++ "b/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/5.js"
@@ -0,0 +1,9 @@
+process.stdin.setEncoding('utf8');
+process.stdin.on('data', data => {
+    const n = data.split(" ");
+    const a = Number(n[0]), b = Number(n[1]);
+    // console.log(a);
+    // console.log(b);
+    const answer = ('*'.repeat(a)+`\n`).repeat(b)
+    console.log(answer)
+});
\ No newline at end of file
diff --git "a/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/6.js" "b/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/6.js"
new file mode 100644
index 00000000..147a7241
--- /dev/null
+++ "b/\354\210\230\354\232\224\354\235\274/MyungHwan/Week05/6.js"
@@ -0,0 +1,10 @@
+function solution(n, m) {
+    let answer = [];
+    
+    const gcd = (n, m) => {
+        if( m === 0) return n
+        return gcd(m, n % m)
+    }
+    const lcm = (n, m) => n * m / gcd(n,m)
+    return [gcd(n,m), lcm(n,m)]
+}
\ No newline at end of file