diff --git a/ch03/02_bonus_efficient-multihead-attention/mha-implementations.ipynb b/ch03/02_bonus_efficient-multihead-attention/mha-implementations.ipynb
index 3ce0f54..14a8727 100644
--- a/ch03/02_bonus_efficient-multihead-attention/mha-implementations.ipynb
+++ b/ch03/02_bonus_efficient-multihead-attention/mha-implementations.ipynb
@@ -334,7 +334,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": null,
    "id": "9a6bd0a2-f27c-4602-afa0-c96cd295c1a6",
    "metadata": {
     "colab": {
@@ -395,7 +395,7 @@
     "            self.mask.bool()[:num_tokens, :num_tokens], -torch.inf\n",
     "        )\n",
     "\n",
-    "        attn_weights = torch.softmax(attn_scores / keys.shape[-1]**-0.5, dim=-1)\n",
+    "        attn_weights = torch.softmax(attn_scores / keys.shape[-1]**0.5, dim=-1)\n",
     "        attn_weights = self.dropout(attn_weights)\n",
     "\n",
     "        # (b, num_heads, num_tokens, num_tokens) --> (b, num_heads, num_tokens, head_dim)\n",
diff --git a/ch05/11_qwen3/README.md b/ch05/11_qwen3/README.md
index 08da9b7..77544a5 100644
--- a/ch05/11_qwen3/README.md
+++ b/ch05/11_qwen3/README.md
@@ -51,7 +51,7 @@ USE_REASONING_MODEL = True
 USE_INSTRUCT_MODEL = False
 # Uses the instruct mode (without reasoning) if 
 # USE_REASONING_MODEL = True
-# USE_INSTRUCT_MODEL = False
+# USE_INSTRUCT_MODEL = True
 # This setting does have no effect if USE_REASONING_MODEL = False
 
 
diff --git a/ch05/11_qwen3/standalone-qwen3-plus-kvcache.ipynb b/ch05/11_qwen3/standalone-qwen3-plus-kvcache.ipynb
index df216ff..fac9a55 100644
--- a/ch05/11_qwen3/standalone-qwen3-plus-kvcache.ipynb
+++ b/ch05/11_qwen3/standalone-qwen3-plus-kvcache.ipynb
@@ -121,7 +121,7 @@
     "USE_INSTRUCT_MODEL = False\n",
     "# Uses the instruct mode (without reasoning) if \n",
     "# USE_REASONING_MODEL = True\n",
-    "# USE_INSTRUCT_MODEL = False\n",
+    "# USE_INSTRUCT_MODEL = True\n",
     "# This setting does have no effect if USE_REASONING_MODEL = False"
    ]
   },
diff --git a/ch05/11_qwen3/standalone-qwen3.ipynb b/ch05/11_qwen3/standalone-qwen3.ipynb
index fd9f588..911eccb 100644
--- a/ch05/11_qwen3/standalone-qwen3.ipynb
+++ b/ch05/11_qwen3/standalone-qwen3.ipynb
@@ -119,7 +119,7 @@
     "USE_INSTRUCT_MODEL = False\n",
     "# Uses the instruct mode (without reasoning) if \n",
     "# USE_REASONING_MODEL = True\n",
-    "# USE_INSTRUCT_MODEL = False\n",
+    "# USE_INSTRUCT_MODEL = True\n",
     "# This setting does have no effect if USE_REASONING_MODEL = False"
    ]
   },