diff --git a/assignments/q1-multiples.js b/assignments/q1-multiples.js
index ebe5e18..2a71976 100644
--- a/assignments/q1-multiples.js
+++ b/assignments/q1-multiples.js
@@ -1,3 +1,9 @@
 function multiples (limit) {
-  // ...
+	var sum = 0;
+	for (var i = 0; i < limit; i++) {
+		if (i % 3 === 0 || i % 5 === 0) {
+			sum += i;
+		}
+	}
+	return sum;
 }
diff --git a/assignments/q2-map.js b/assignments/q2-map.js
index a01bc71..affb66a 100644
--- a/assignments/q2-map.js
+++ b/assignments/q2-map.js
@@ -1,3 +1,7 @@
 function map (xs, fn) {
-  // ...
+	var result = [];
+	for (var i = 0; i < xs.length; i++) {
+		result[i] = fn(xs[i]);
+	}
+	return result;
 }
diff --git a/assignments/q3-filter.js b/assignments/q3-filter.js
index 757f6f1..196dab4 100644
--- a/assignments/q3-filter.js
+++ b/assignments/q3-filter.js
@@ -1,3 +1,9 @@
 function filter (xs, condition) {
-  // ...
+	var result = [];
+	xs.forEach(function(entry){
+		if (condition(entry)) {
+			result.push(entry);
+		}
+	});
+	return result;
 }
diff --git a/assignments/q4-reduce.js b/assignments/q4-reduce.js
index becc358..46aab0b 100644
--- a/assignments/q4-reduce.js
+++ b/assignments/q4-reduce.js
@@ -1,4 +1,7 @@
 function reduce (xs, fn, seed) {
-  // NOTE: that seed is optional; you should give the appropriate default in the function body
-  // ...
-}
+	var memo = seed;
+	for (var i = !memo ? 1 : 0; i < xs.length; i++) {
+		memo = fn(!memo ? xs[0] : memo, xs[i]);
+	}
+	return memo;
+}
\ No newline at end of file