diff --git a/extra/project-euler/001/001-tests.factor b/extra/project-euler/001/001-tests.factor
index 8d2461a510..1cab275619 100644
--- a/extra/project-euler/001/001-tests.factor
+++ b/extra/project-euler/001/001-tests.factor
@@ -4,3 +4,4 @@ IN: project-euler.001.tests
 [ 233168 ] [ euler001 ] unit-test
 [ 233168 ] [ euler001a ] unit-test
 [ 233168 ] [ euler001b ] unit-test
+[ 233168 ] [ euler001c ] unit-test
diff --git a/extra/project-euler/001/001.factor b/extra/project-euler/001/001.factor
index 1e49be9a60..c9145c9b73 100644
--- a/extra/project-euler/001/001.factor
+++ b/extra/project-euler/001/001.factor
@@ -1,4 +1,4 @@
-! Copyright (c) 2007 Aaron Schaefer.
+! Copyright (c) 2007, 2008 Aaron Schaefer, Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: kernel math math.ranges sequences ;
 IN: project-euler.001
@@ -51,4 +51,11 @@ PRIVATE>
 ! [ euler001b ] 100 ave-time
 ! 0 ms run / 0 ms GC ave time - 100 trials
 
+
+: euler001c ( -- answer )
+    1000 [ { 3 5 } [ mod 0 = ] with contains? ] filter sum ;
+
+! [ euler001c ] 100 ave-time
+! 0 ms ave run time - 0.06 SD (100 trials)
+
 MAIN: euler001