diff --git a/README.md b/README.md
index 7cab4d9..bc49ed2 100644
--- a/README.md
+++ b/README.md
@@ -147,6 +147,153 @@ Doing  pattern problem question in C and C++
 	2 3
 	4 5 6
 	7 8 9 10 
+
+
+20.
+
+    *******
+    *     *
+    *     *
+    *     *
+    *     *
+    *     *
+    *******
+
+21.
+
+    ***** *****
+    ****   ****
+    ***     ***
+    **       **
+    *         *
+    *         *
+    **       **
+    ***     ***
+    ****   ****
+    ***** *****
+
+22.
+
+        *
+       * *
+      *   *
+     *     *
+    *       *
+    *        *
+     *      *
+      *    *
+       *  *
+        *
+
+23.
+
+    1
+    2*2
+    3*3*3
+    4*4*4*4
+    5*5*5*5*5
+    6*6*6*6*6*6
+    7*7*7*7*7*7*7
+
+24.
+
+    A
+    ABA
+    ABCBA
+    ABCDCBA
+    ABCDEDCBA
+    ABCDEFEDCBA
+    ABCDEFGFEDCBA
+
+25.
+
+    1
+    12
+    1 3
+    1  4
+    1   5
+    1    6
+    1234567
+
+26.
+
+    1234567
+    2    7
+    3   7
+    4  7
+    5 7
+    67
+    7
+
+27.
+
+    ********1********
+    *******2*2*******
+    ******3*3*3******
+    *****4*4*4*4*****
+    ****5*5*5*5*5****
+    ***6*6*6*6*6*6***
+    **7*7*7*7*7*7*7**
+    *8*8*8*8*8*8*8*8*
+    9*9*9*9*9*9*9*9*9
+
+28.
+
+          1
+         121
+        12321
+       1234321
+      123454321
+     12345654321
+    1234567654321
+
+29.
+
+    1
+    2*3
+    4*5*6
+    7*8*9*10
+    11*12*13*14*15
+    11*12*13*14*15
+    7*8*9*10
+    4*5*6
+    2*3
+    1
+
+
+30.
+
+    1
+    1 1
+    1 2 1
+    1 3 3 1
+    1 4 6 4 1
+    1 5 10 10 5 1
+    1 6 15 20 15 6 1
+
+31.
+
+    1
+    123
+    12345
+    1234521
+    123454321
+    12345
+    123
+    1
+
+32.
+
+    *        *
+    **      **
+    ***    ***
+    ****  ****
+    **********
+    **********
+    ****  ****
+    ***    ***
+    **      **
+    *        *
    
    
    
diff --git a/pattern20.cpp b/pattern20.cpp
new file mode 100644
index 0000000..7b6605a
--- /dev/null
+++ b/pattern20.cpp
@@ -0,0 +1,19 @@
+#include<iostream>
+using namespace std;
+
+int main(){
+    int n;
+    cin>>n;
+    for(int i =0;i<n;i++){
+        for(int j=0;j<n;j++){
+            if(i==0 || i== n-1 || j == 0 || j== n-1){ 
+             cout<< "*" ;
+            }
+            else{
+                cout<<" ";
+            }
+        }
+        cout<<endl;           
+     }
+    return 0;
+}
\ No newline at end of file
diff --git a/pattern21.cpp b/pattern21.cpp
new file mode 100644
index 0000000..9751797
--- /dev/null
+++ b/pattern21.cpp
@@ -0,0 +1,33 @@
+#include<iostream>
+using namespace std;
+
+int main(){
+    int n;
+    cin>>n;
+    for(int i =0;i<n;i++){
+        for(int j=0;j<n-i;j++){ 
+             cout<< "*" ; 
+        }
+        for(int j =0;j<((2*i)+1);j++){
+            cout<<" ";
+        }
+        for(int k =0;k<n-i;k++){
+            cout<<"*";
+        }
+        cout<<endl;           
+     }
+
+      for(int i =0;i<n;i++){
+        for(int j=0;j<i+1;j++){ 
+             cout<< "*" ; 
+        }
+        for(int j =0;j<((2*n)-(2*i)-1);j++){
+            cout<<" ";
+        }
+        for(int k =0;k<i+1;k++){
+            cout<<"*";
+        }
+        cout<<endl;           
+     }
+    return 0;
+}
\ No newline at end of file
diff --git a/pattern22.cpp b/pattern22.cpp
new file mode 100644
index 0000000..4373fec
--- /dev/null
+++ b/pattern22.cpp
@@ -0,0 +1,39 @@
+#include<iostream>
+using namespace std;
+
+int main(){
+    int n;
+    cin>>n;
+    // upper
+    for(int i =0;i<n;i++){
+        for(int j=0;j<n-i-1;j++){ 
+             cout<< " " ; 
+        }
+        for(int k=0;k<i+1;k++){
+            if(k==0||k==(i+1)-1){
+            cout<<"* ";
+            }
+            else{
+                cout<<"  ";
+            }
+        }
+
+        cout<<endl;           
+     }
+
+// lower
+     
+     for(int i =0;i<n;i++){
+        for(int j=0;j<i;j++){ 
+             cout<< " " ; 
+        }
+        for(int k=0;k<(2*n)-(2*i)-1;k++){
+       if(k==0||k==((2*n)-(2*i)-1)-1)
+            cout<<"* ";
+            else
+            cout<<" ";
+        }
+        cout<<endl;           
+     }
+    return 0;
+}
\ No newline at end of file
diff --git a/pattern23.cpp b/pattern23.cpp
new file mode 100644
index 0000000..d494fc5
--- /dev/null
+++ b/pattern23.cpp
@@ -0,0 +1,18 @@
+#include<iostream>
+using namespace std;
+
+int main(){
+    int n;
+    cin>>n;
+    for(int i =0;i<n;i++){
+        for(int j=0;j<(2*i)+1;j++){ 
+            if(j%2==1)
+             cout<< "*" ; 
+             else
+             cout<<i+1;
+
+        }
+        cout<<endl;           
+     }
+    return 0;
+}
\ No newline at end of file
diff --git a/pattern24.cpp b/pattern24.cpp
new file mode 100644
index 0000000..6445509
--- /dev/null
+++ b/pattern24.cpp
@@ -0,0 +1,18 @@
+#include<iostream>
+using namespace std;
+int main(){
+    int n;
+    cin>>n;
+    for(int i =0;i<n;i++){
+        char ch;
+        for(int j=0;j<i+1;j++){ 
+             ch = j+1 +'A'-1;
+             cout<<ch  ; 
+        }
+        for(char t=ch;t>'A';){
+            t=t-1;
+            cout<<t;
+        }
+        cout<<endl;           
+     }
+}
\ No newline at end of file
diff --git a/pattern25.cpp b/pattern25.cpp
new file mode 100644
index 0000000..7a4e2d2
--- /dev/null
+++ b/pattern25.cpp
@@ -0,0 +1,18 @@
+#include<iostream>
+using namespace std;
+int main(){
+    int n;
+    cin>>n;
+    for(int i =0;i<n;i++){
+        for(int j=0;j<=i;j++){
+            if(j==0||j==i||i==n-1) {
+             cout<< j+1 ;
+            }
+             else{
+             cout<<" "; 
+                    } 
+         }
+        cout<<endl;           
+     }
+    return 0;
+}
\ No newline at end of file
diff --git a/pattern26.cpp b/pattern26.cpp
new file mode 100644
index 0000000..6cba18d
--- /dev/null
+++ b/pattern26.cpp
@@ -0,0 +1,16 @@
+#include<iostream>
+using namespace std;
+int main(){
+    int n;
+    cin>>n;
+    for(int i =0;i<n;i++){
+        for(int j=i+1;j<=n;j++){
+            if(i==0||j==n||j==i+1) 
+             cout<< j ;
+             else
+             cout<<" "; 
+        }
+        cout<<endl;           
+     }
+    return 0;
+}
\ No newline at end of file
diff --git a/pattern27.cpp b/pattern27.cpp
new file mode 100644
index 0000000..9383195
--- /dev/null
+++ b/pattern27.cpp
@@ -0,0 +1,23 @@
+#include<iostream>
+using namespace std;
+int main(){
+    int n;
+    cin>>n;
+    for(int i=0;i<n;i++){
+        int start_num_index = 8-i;
+        int num = i+1;
+        int count_num =num;
+        for(int j=0;j<17;j++){ 
+            if(j==start_num_index && count_num > 0){
+                cout<<num;
+                start_num_index+=2;
+                count_num--;
+            }
+            else{
+                cout<<"*";
+            }
+        }
+        cout<<endl;           
+     }
+    return 0;
+}
\ No newline at end of file
diff --git a/pattern28.cpp b/pattern28.cpp
new file mode 100644
index 0000000..ce17d9d
--- /dev/null
+++ b/pattern28.cpp
@@ -0,0 +1,31 @@
+#include<iostream>
+using namespace std;
+int main(){
+    int n;
+    cin>>n;
+    int k=n;
+    for(int i=0;i<n;i++){
+        int c=1;
+        for(int j=0;j<k;j++){
+            if(j<n-i-1){
+                cout<<" ";
+            } 
+            else if (j<=n-1){
+                cout<<c;
+                c++;
+            }
+            else if(j==n){
+                c=c-2;
+                cout<<c;
+                c--;
+            }
+            else{
+                cout<<c;
+                c--;
+            }   
+        }
+        k++;
+        cout<<endl;           
+     }
+    return 0;
+}
\ No newline at end of file
diff --git a/pattern29.cpp b/pattern29.cpp
new file mode 100644
index 0000000..627668a
--- /dev/null
+++ b/pattern29.cpp
@@ -0,0 +1,32 @@
+#include<iostream>
+using namespace std;
+
+int main(){
+    int n;
+    cin>>n;
+    int c=1;
+    for(int i =0;i<n;i++){
+        for(int j=0;j<=i;j++){ 
+             cout<< c ; 
+             c++;
+             if(j<i){
+                cout<<"*";
+             }
+        }
+        cout<<endl;           
+     }
+     int start = c-n;
+      for(int i =0;i<n;i++){
+        int k = start;
+       for(int j=0;j<=n-i-1;j++){
+            cout<<k;
+            k++;
+            if(j<n-i-1){
+                cout<<"*";
+            }
+
+        }
+        start=start-(n-i-1);
+        cout<<endl;
+      }
+}
\ No newline at end of file
diff --git a/pattern30.cpp b/pattern30.cpp
new file mode 100644
index 0000000..66a6e77
--- /dev/null
+++ b/pattern30.cpp
@@ -0,0 +1,15 @@
+#include<iostream>
+using namespace std;
+
+int main(){
+    int n;
+    cin>>n;
+    for(int i =1;i<=n;i++){
+         int c=1;
+        for(int j=1;j<=i;j++){ 
+             cout<< c<<" " ; 
+             c=c*(i-j)/j;
+        }
+        cout<<endl;           
+     }
+}
\ No newline at end of file
diff --git a/pattern31.cpp b/pattern31.cpp
new file mode 100644
index 0000000..1a8cd69
--- /dev/null
+++ b/pattern31.cpp
@@ -0,0 +1,20 @@
+#include<iostream>
+using namespace std;
+int main(){
+    int n;
+    cin>>n;
+    for(int i =0;i<n;i++){
+        int cond = i<= n/2 ? 2*i : 2*(n-i-1);
+        for(int j=0;j<=cond;j++){ 
+            if(j<=n/2){
+             cout<< j+1 ; 
+             }
+             else{
+                cout<<cond-j+1;
+
+             }
+        }
+        cout<<endl;           
+     }
+    return 0;
+}
\ No newline at end of file
diff --git a/pattern32.cpp b/pattern32.cpp
new file mode 100644
index 0000000..f3349d5
--- /dev/null
+++ b/pattern32.cpp
@@ -0,0 +1,26 @@
+#include<iostream>
+using namespace std;
+
+int main(){
+    int n;
+    cin>>n;
+    for(int i=0;i<2*n;i++){
+        int cond = i<n ? i : n+ (n-i-1);
+        int space_count = i<n ? 2*(n-cond-1) : i- cond-1;
+        for(int j=0;j<2*n;j++){ 
+            if(j<=cond){
+           cout<< "*" ; 
+            }
+            else if(space_count>0){
+                cout<<" ";
+                space_count--;
+            }
+            else{
+                cout<<"*";
+            }
+        }
+        cout<<endl;           
+     }
+
+  return 0;
+}
\ No newline at end of file