diff --git "a/src/inflearn_coding_test/basic/3-1_\355\232\214\353\254\270\353\254\270\354\236\220\354\227\264.js" "b/src/inflearn_coding_test/basic/3-1_\355\232\214\353\254\270\353\254\270\354\236\220\354\227\264.js"
new file mode 100644
index 0000000..b895ce7
--- /dev/null
+++ "b/src/inflearn_coding_test/basic/3-1_\355\232\214\353\254\270\353\254\270\354\236\220\354\227\264.js"
@@ -0,0 +1,19 @@
+function solution(str) {
+  const newStr = str.toLowerCase();
+  let isPalindrome = false;
+
+  for (let i = 0; i < newStr.length / 2; i++) {
+    if (newStr[i] !== newStr[newStr.length - i - 1]) {
+      isPalindrome = false;
+      return isPalindrome;
+    } else {
+      isPalindrome = true;
+    }
+  }
+
+  return isPalindrome;
+}
+
+console.log(solution('gooG')); // true
+console.log(solution('aba')); // true
+console.log(solution('abca')); // false
diff --git "a/src/inflearn_coding_test/basic/3-2_\355\216\240\353\246\260\353\223\234\353\241\254.js" "b/src/inflearn_coding_test/basic/3-2_\355\216\240\353\246\260\353\223\234\353\241\254.js"
new file mode 100644
index 0000000..fc5755a
--- /dev/null
+++ "b/src/inflearn_coding_test/basic/3-2_\355\216\240\353\246\260\353\223\234\353\241\254.js"
@@ -0,0 +1,18 @@
+function solution(str) {
+  const newStr = str.toLowerCase().replace(/[^a-z]/g, '');
+  let isPalindrome = false;
+
+  for (let i = 0; i < newStr.length / 2; i++) {
+    if (newStr[i] !== newStr[newStr.length - i - 1]) {
+      isPalindrome = false;
+      return isPalindrome;
+    } else {
+      isPalindrome = true;
+    }
+  }
+
+  return isPalindrome;
+}
+
+console.log(solution('found7, time: study; Yduts; emit, 7Dnuof')); // YES
+console.log(solution('sungminkim')); // NO