2 files changed, 19 insertions, 0 deletions
diff --git a/prolog/problems/clp_fd/puzzle_beth_1/common.py b/prolog/problems/clp_fd/puzzle_beth_1/common.py
new file mode 100644
index 0000000..a7bcfeb
--- /dev/null
+++ b/prolog/problems/clp_fd/puzzle_beth_1/common.py
@@ -0,0 +1,9 @@
+id = 155
+group = 'clp_fd'
+number = 56
+visible = True
+facts = None
+
+solution = '''\
+puzzle_beth(X) :-
+  X + 2 #= 2*(X-5).'''
diff --git a/prolog/problems/clp_fd/puzzle_beth_1/en.py b/prolog/problems/clp_fd/puzzle_beth_1/en.py
new file mode 100644
index 0000000..7f4ebc2
--- /dev/null
+++ b/prolog/problems/clp_fd/puzzle_beth_1/en.py
@@ -0,0 +1,10 @@
+id = 155
+name = 'puzzle_beth/1'
+slug = 'age puzzle: beth'
+
+description = '''\
+<p>When asked how old she was, Beth replied "In two years I will be twice as old as I was five years ago".</p>
+<p>Write the predicate <code>puzzle_beth(X)</code> that finds her current age as <code>X</code>.</p>
+'''
+
+hint = {}