diff --git a/reasoning_gym/algorithmic/base_conversion.py b/reasoning_gym/algorithmic/base_conversion.py
index 96dd106d..766c619c 100644
--- a/reasoning_gym/algorithmic/base_conversion.py
+++ b/reasoning_gym/algorithmic/base_conversion.py
@@ -71,14 +71,14 @@ class BaseConversionDataset:
         value, source_base, target_base = self._generate_conversion(rng)
         
         # Convert decimal to source base representation
-        source_repr = format(value, f'x' if source_base == 16 else f'b' if source_base == 2 else '')
+        source_repr = format(value, f'x' if source_base == 16 else f'b' if source_base == 2 else '').strip()
         if source_base not in (2, 16):
-            source_repr = format(value, f'{source_base}x').rstrip('L').lower()
+            source_repr = format(value, f'{source_base}x').rstrip('L').lower().strip()
             
         # Convert decimal to target base for answer
-        target_repr = format(value, f'x' if target_base == 16 else f'b' if target_base == 2 else '')
+        target_repr = format(value, f'x' if target_base == 16 else f'b' if target_base == 2 else '').strip()
         if target_base not in (2, 16):
-            target_repr = format(value, f'{target_base}x').rstrip('L').lower()
+            target_repr = format(value, f'{target_base}x').rstrip('L').lower().strip()
         
         source_name = self._format_base_name(source_base)
         target_name = self._format_base_name(target_base)