diff --git a/fundamentals-of-ai-and-kr/module1/main.pdf b/fundamentals-of-ai-and-kr/module1/main.pdf
index 4532720..8d8bffa 100644
Binary files a/fundamentals-of-ai-and-kr/module1/main.pdf and b/fundamentals-of-ai-and-kr/module1/main.pdf differ
diff --git a/fundamentals-of-ai-and-kr/module3/main.pdf b/fundamentals-of-ai-and-kr/module3/main.pdf
index 5db2ae5..8647580 100644
Binary files a/fundamentals-of-ai-and-kr/module3/main.pdf and b/fundamentals-of-ai-and-kr/module3/main.pdf differ
diff --git a/machine-learning-and-data-mining/main.pdf b/machine-learning-and-data-mining/main.pdf
index d34ee74..5284c7b 100644
Binary files a/machine-learning-and-data-mining/main.pdf and b/machine-learning-and-data-mining/main.pdf differ
diff --git a/statistical-and-mathematical-methods-for-ai/main.pdf b/statistical-and-mathematical-methods-for-ai/main.pdf
index 33058a8..31a40a4 100644
Binary files a/statistical-and-mathematical-methods-for-ai/main.pdf and b/statistical-and-mathematical-methods-for-ai/main.pdf differ