diff --git a/2.C b/2.C
new file mode 100644
index 0000000..82dc007
--- /dev/null
+++ b/2.C
@@ -0,0 +1,12 @@
+#include<stdio.h>
+void main()
+{
+ int c,a,i;
+printf("enter any number");
+scanf("%D",&a);
+for(i=1;i<=10;i++)
+{  c=(a*i);
+ printf("\n d=(%d*%d)",c,a,i);
+}
+getch();
+}
diff --git a/3.c b/3.c
new file mode 100644
index 0000000..e6bb553
--- /dev/null
+++ b/3.c
@@ -0,0 +1,15 @@
+#include<stdio.h>
+
+void main()
+{
+    int  i,a;
+    printf("enter any number");
+    scanf("%d",&a);
+    for(i=(a-1);i>1;i--)
+    {
+        if(a%i==0)
+        printf("it is a prime number");
+
+    }
+
+}
\ No newline at end of file
diff --git a/4.C b/4.C
new file mode 100644
index 0000000..390e07c
--- /dev/null
+++ b/4.C
@@ -0,0 +1,19 @@
+#include<stdio.h>
+#include<conio.h>
+void main()
+{
+ clrscr();
+
+int matchsticks,user,computer;
+matchsticks=21;
+while(matchsticks>1)
+{
+printf("\nenter any number");
+scanf("%d",&user);
+computer=(5-user);
+printf("\n%d",computer);
+matchsticks=matchsticks-user-computer;
+}
+printf("you lost");
+getch();
+}
\ No newline at end of file