1 files changed, 4 insertions, 0 deletions
diff --git a/problem21.ijs b/problem21.ijs
new file mode 100644
index 0000000..3f86261
--- /dev/null
+++ b/problem21.ijs
@@ -0,0 +1,4 @@
+d =. [:+/i.#~0=i.|]
+a =. (]=d&d)*.]~:d
+nums =. i.10000
+problem21 =: +/nums#~a"0 nums