single line pre for numpy

curriculum/challenges/english/08-data-analysis-with-python/numpy/copying-arrays-warning.md

@@ -21,21 +21,21 @@ b[2] = 20
 
 ## --answers--
 
-```python
+<pre>
 [1 2 3 4 5]
-```
+</pre>
 
 ---
 
-```python
+<pre>
 [1 2 20 4 5]
-```
+</pre>
 
 ---
 
-```python
+<pre>
 [1 20 3 4 5]
-```
+</pre>
 
 ## --video-solution--
 

curriculum/challenges/english/08-data-analysis-with-python/numpy/mathematics.md

@@ -20,27 +20,27 @@ b = np.max(a, axis=1).sum()
 
 ## --answers--
 
-```py
+<pre>
 10
-```
+</pre>
 
 ---
 
-```py
+<pre>
 7
-```
+</pre>
 
 ---
 
-```py
+<pre>
 5
-```
+</pre>
 
 ---
 
-```py
+<pre>
 15
-```
+</pre>
 
 ## --video-solution--