diff --git a/src/multiplication.c b/src/multiplication.c
index c8dbe28..6bba9a4 100644
--- a/src/multiplication.c
+++ b/src/multiplication.c
@@ -9,9 +9,7 @@ double multi( double num1, double num2) {
     return (num1 * num2);
 }
 
-double square(double x) {
-    return x * x;
-}
+
 
 int multi_three_integers(int a, int b, int c) {
     return a * b * c;
@@ -23,9 +21,7 @@ int multi_left_shift(int a, int b) {
 int multi_right_shift(int a, int b) {
     return a >> b;
 }
-int multi_by_five(int a) {
-    return a * 5;
-}
+
 
 float multi_by_percentage(float num, float percentage) {
     return num * (percentage / 100);
@@ -107,9 +103,7 @@ int multi_increment(int num1, int num2) {
     return result;
 }
 
-int multi_by_prime_and_its_square(int num, int prime) {
-    return num * (prime + square (prime));
-}
+
 
 int multi_by_odd(int num, int factor) {
     int result = 0;
@@ -149,19 +143,6 @@ int multi_recursive_optimized(int num1, int num2) {
     return result;
 }
 
-int multi_octal_numbers(int num1, int num2) {
-    int result = 0;
-    while (num2 != 0) {
-        if (num2 & 1) {
-            result += num1;
-        }
-        num1 <<= 3; // Décalage octal
-        num2 >>= 1;
-    }
-   
-    return result;
-}
-
 int multi_hex_numbers(int num1, int num2) {
     int result = 0;
     while (num2 != 0) {
@@ -255,6 +236,15 @@ int karatsu_multi(int num1, int num2) {
 }
 
 
+int multi_repetition(int a, int n) {
+    int resultat = 0;
+    for (int i = 0; i < n; i++) {
+        resultat += a;
+    }
+    return resultat;
+}
+
+
 
 
 
diff --git a/src/multiplication.h b/src/multiplication.h
index cf2b1a1..7122e36 100644
--- a/src/multiplication.h
+++ b/src/multiplication.h
@@ -1,11 +1,11 @@
 #ifndef MULTIPLICATION_H
 #define MULTIPLICATION_H
 extern double multi(double num1, double num2);
-double square(double x);
+
 int multi_three_integers(int a, int b, int c);
 int multi_left_shift(int a, int b);
 int multi_right_shift(int a, int b);
-int multi_by_five(int a);
+
 float multi_by_percentage(float num, float percentage);
 int multi_by_random(int num);
 int multi_string(const char* str, int factor);
@@ -17,12 +17,11 @@ int multi_logical_op(int num1, int num2);
 int multi_modulo(int num1, int num2, int modulo);
 int multi_by_prime(int num, int prime);
 int multi_increment(int num1, int num2);
-int multi_by_prime_and_its_square(int num, int prime);
+
 int multi_by_odd(int num, int factor);
 int multi_binary_enumeration(int num1, int num2);
 int multi_differences(int num1, int num2);
 int multi_recursive_optimized(int num1, int num2);
-int multi_octal_numbers(int num1, int num2);
 int multi_hex_numbers(int num1, int num2);
 int multi_exponentiation(int base, int exponent);
 int multi_by_euler_prime(int num);
@@ -32,6 +31,7 @@ int bernoulli_multi(int num, int bernoulli);
 float power_multi(float base, int exponent);
 int bitwisee_multi(int num1, int num2);
 int karatsu_multi(int num1, int num2);
+int multi_repetition(int a, int n);