diff --git a/exercises/binary/.deprecated b/exercises/binary/.deprecated
new file mode 100644
index 0000000000..24f60a89b1
--- /dev/null
+++ b/exercises/binary/.deprecated
@@ -0,0 +1,3 @@
+**NOTE: This exercise has been deprecated**
+Your track should implement "all-your-base" instead.
+https://github.com/exercism/x-common/issues/279
diff --git a/exercises/hexadecimal/.deprecated b/exercises/hexadecimal/.deprecated
new file mode 100644
index 0000000000..24f60a89b1
--- /dev/null
+++ b/exercises/hexadecimal/.deprecated
@@ -0,0 +1,3 @@
+**NOTE: This exercise has been deprecated**
+Your track should implement "all-your-base" instead.
+https://github.com/exercism/x-common/issues/279
diff --git a/exercises/octal/.deprecated b/exercises/octal/.deprecated
new file mode 100644
index 0000000000..24f60a89b1
--- /dev/null
+++ b/exercises/octal/.deprecated
@@ -0,0 +1,3 @@
+**NOTE: This exercise has been deprecated**
+Your track should implement "all-your-base" instead.
+https://github.com/exercism/x-common/issues/279
diff --git a/exercises/trinary/.deprecated b/exercises/trinary/.deprecated
new file mode 100644
index 0000000000..24f60a89b1
--- /dev/null
+++ b/exercises/trinary/.deprecated
@@ -0,0 +1,3 @@
+**NOTE: This exercise has been deprecated**
+Your track should implement "all-your-base" instead.
+https://github.com/exercism/x-common/issues/279