diff --git a/02_math_osztaly.txt b/02_math_osztaly.txt
index baa531d..266cbc8 100644
--- a/02_math_osztaly.txt
+++ b/02_math_osztaly.txt
@@ -147,9 +147,9 @@ UML:
 | + seed(s : unsigned int) { static }                        |  -> srand(s);
 | + randomize() { static }                                   |  -> srand(time(NULL));
 |                                                            |
-| + rand() : int { static }                                  |  -> return rand();
-| + randf() : float { static }                               |  -> return rand() / static_cast<float>(RANDOM_32BIT_MAX);
-| + randd() : double { static }                              |  -> return rand() / static_cast<double>(RANDOM_32BIT_MAX);
+| + rand() : int { static }                                  |  -> return ::rand();
+| + randf() : float { static }                               |  -> return ::rand() / static_cast<float>(RANDOM_32BIT_MAX);
+| + randd() : double { static }                              |  -> return ::rand() / static_cast<double>(RANDOM_32BIT_MAX);
 |                                                            |
 | + rand(int m) : int { static }                             |  -> return rand() % m;
 |                                                            |
diff --git a/02_math_osztaly/math.cpp b/02_math_osztaly/math.cpp
index 03106a3..9bb5581 100644
--- a/02_math_osztaly/math.cpp
+++ b/02_math_osztaly/math.cpp
@@ -44,22 +44,22 @@ void Math::randomize() {
 }
 
 int Math::rand() {
-	return rand();
+	return ::rand();
 }
 
 float Math::randf() {
-	return rand() / static_cast<float>(RANDOM_32BIT_MAX);
+	return ::rand() / static_cast<float>(RANDOM_32BIT_MAX);
 }
 
 double Math::randd() {
-	return rand() / static_cast<double>(RANDOM_32BIT_MAX);
+	return ::rand() / static_cast<double>(RANDOM_32BIT_MAX);
 }
 
-int rand(const int m) {
+int Math::rand(const int m) {
     return rand() % m;
 }
 
-int rand(const int from, const int to) {
+int Math::rand(const int from, const int to) {
     return (rand() % (to - from)) + from;
 }
 
diff --git a/03_monopoly/math.cpp b/03_monopoly/math.cpp
index 03106a3..9bb5581 100644
--- a/03_monopoly/math.cpp
+++ b/03_monopoly/math.cpp
@@ -44,22 +44,22 @@ void Math::randomize() {
 }
 
 int Math::rand() {
-	return rand();
+	return ::rand();
 }
 
 float Math::randf() {
-	return rand() / static_cast<float>(RANDOM_32BIT_MAX);
+	return ::rand() / static_cast<float>(RANDOM_32BIT_MAX);
 }
 
 double Math::randd() {
-	return rand() / static_cast<double>(RANDOM_32BIT_MAX);
+	return ::rand() / static_cast<double>(RANDOM_32BIT_MAX);
 }
 
-int rand(const int m) {
+int Math::rand(const int m) {
     return rand() % m;
 }
 
-int rand(const int from, const int to) {
+int Math::rand(const int from, const int to) {
     return (rand() % (to - from)) + from;
 }