diff --git a/build.zig b/build.zig
index 3b753ee..25d831c 100644
--- a/build.zig
+++ b/build.zig
@@ -1269,7 +1269,7 @@ const exercises = [_]Exercise{
         \\Max difference (new fn): 0.014
         ,
     },
-    .{ .main_file = "110_bit_manipulation3.zig", .output = 
+    .{ .main_file = "110_quiz9.zig", .output = 
     \\Toggle pins with XOR on PORTB
     \\-----------------------------
     \\  1100 // (initial state of PORTB)
diff --git a/exercises/110_bit_manipulation3.zig b/exercises/110_quiz9.zig
similarity index 100%
rename from exercises/110_bit_manipulation3.zig
rename to exercises/110_quiz9.zig
diff --git a/patches/patches/110_bit_manipulation3.patch b/patches/patches/110_quiz9.patch
similarity index 92%
rename from patches/patches/110_bit_manipulation3.patch
rename to patches/patches/110_quiz9.patch
index 9c64336..9d9b864 100644
--- a/patches/patches/110_bit_manipulation3.patch
+++ b/patches/patches/110_quiz9.patch
@@ -1,5 +1,5 @@
---- exercises/110_bit_manipulation3.zig	2025-02-08 11:52:35.609300707 -0800
-+++ answers/110_bit_manipulation3.zig	2025-02-08 13:00:15.414038314 -0800
+--- exercises/110_quiz9.zig	2025-02-08 13:19:48.522641785 -0800
++++ answers/110_quiz9.zig	2025-02-10 17:42:04.525004335 -0800
 @@ -108,7 +108,7 @@
      PORTB = 0b1100;
      print("  {b:0>4} // (initial state of PORTB)\n", .{PORTB});