diff --git a/arrTask.js b/arrTask.js
new file mode 100644
index 0000000..69fbcd5
--- /dev/null
+++ b/arrTask.js
@@ -0,0 +1,26 @@
+let union = (a, b) => {
+    var setA = new Set(a);
+    var setB = new Set(b);
+    var newArr = new Set([...setA, ...setB]);
+    return [...newArr];
+}
+
+console.log(union([4, 5, 7, 2, 1, 5], [1, 2, 3, 7, 9]));
+
+let intersection = (a, b) => {
+    var setA = new Set(a);
+    var setB = new Set(b);
+    var newArr = ([...setA].filter(x => setB.has(x)));
+    return [...newArr];
+}
+
+console.log(intersection([0, 1, 6, 2, 4, 3], [5, 4, 3, 2, 1, 7, 0]));
+
+let difference = (a, b) => {
+    var setA = new Set(a);
+    var setB = new Set(b);
+    var newArr = ([...setA].filter(x => !(setB.has(x))));
+    return [...newArr];
+}
+
+console.log(difference([1, 2, 3, 7, 9], [4, 5, 7, 2, 1, 5]))
\ No newline at end of file