diff --git a/assignments/q1-multiples.js b/assignments/q1-multiples.js
index ebe5e18..67c1d39 100644
--- a/assignments/q1-multiples.js
+++ b/assignments/q1-multiples.js
@@ -1,3 +1,11 @@
+// Find the sum of all positive multiples of 3 or 5 below a specified number (limit).
+
 function multiples (limit) {
-  // ...
-}
+	var sum = 0;
+	for (var i = 1; i < limit; i++) {
+		if (i % 3 == 0 || i % 5 == 0) {
+			sum = sum + i;
+		}
+	}
+	return sum;
+}
\ No newline at end of file
diff --git a/assignments/q2-map.js b/assignments/q2-map.js
index a01bc71..f05db5c 100644
--- a/assignments/q2-map.js
+++ b/assignments/q2-map.js
@@ -1,3 +1,7 @@
 function map (xs, fn) {
-  // ...
-}
+  	var trans = new Array();
+ 	for (var x in xs) {
+		trans.push(fn(xs[x]));
+  	}
+  	return trans;
+}
\ No newline at end of file
diff --git a/assignments/q3-filter.js b/assignments/q3-filter.js
index 757f6f1..a65add1 100644
--- a/assignments/q3-filter.js
+++ b/assignments/q3-filter.js
@@ -1,3 +1,8 @@
 function filter (xs, condition) {
-  // ...
+	var filtered = new Array();
+	for (var x in xs) {
+		if (condition(xs[x]) )
+			filtered.push(xs[x]);
+	}
+	return filtered;
 }
diff --git a/assignments/q4-reduce.js b/assignments/q4-reduce.js
index becc358..278b6ed 100644
--- a/assignments/q4-reduce.js
+++ b/assignments/q4-reduce.js
@@ -1,4 +1,10 @@
 function reduce (xs, fn, seed) {
-  // NOTE: that seed is optional; you should give the appropriate default in the function body
-  // ...
-}
+ 	// NOTE: that seed is optional; you should give the appropriate default in the function body
+
+  	var init = (typeof seed === "undefined") ? xs[0] : seed;
+  	var i = (typeof seed === "undefined") ? 1 : 0;	
+
+  	for (i; i < xs.length; i++)
+  		init = fn(init, xs[i]);
+  	return init;
+}
\ No newline at end of file