diff --git a/solutions.js b/solutions.js
index 4c83672..6a6b75b 100644
--- a/solutions.js
+++ b/solutions.js
@@ -21,3 +21,66 @@
  * concat
  */
 
+// 1. isTrue
+function isTrue(input) {
+    return input === true;
+}
+
+// 2. isFalse
+function isFalse(input) {
+    return input === false;
+}
+
+// 3. not
+function not(input) {
+    return !input;
+}
+
+// 4. addOne
+function addOne(input) {
+    return Number(input) + 1;
+}
+
+// 5. isEven
+function isEven(input) {
+    let evenInput = parseFloat(input);
+    return (evenInput % 2 === 0);
+}
+
+// 6. isIdentical
+function isIdentical(arg1, arg2) {
+    return arg1 === arg2;
+}
+
+// 7. isEqual
+function isEqual(arg1, arg2) {
+    return arg1 == arg2;
+}
+
+// 8. or
+function or(arg1, arg2) {
+    return arg1 || arg2;
+}
+
+// 9. and
+function and(arg1, arg2) {
+    return arg1 && arg2;
+}
+
+
+// 10. concat
+// function concat(arg1, arg2) {
+//     if (arg1 === true && arg2 === true) {
+//         return "truetrue";
+//     } else if (typeof arg1 === 'string' && typeof arg2 === 'string') {
+//         return arg1 + arg2; // Concatenate two strings
+//     } else if (typeof arg1 === 'number' && typeof arg2 === 'number') {
+//         return String(arg1) + String(arg2); // Convert numbers to strings and concatenate
+//     }
+// }
+
+function concat(arg1, arg2) {
+    let stringOne = arg1.toString();
+    let stringTwo = arg2.toString();
+    return (stringOne + stringTwo)
+}
\ No newline at end of file