diff --git a/OS/bash/Week3/addq1.sh b/OS/bash/Week3/addq1.sh
new file mode 100644
index 0000000..f15a41f
--- /dev/null
+++ b/OS/bash/Week3/addq1.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+
+echo "Enter a number"
+read no
+
+is_prime=true
+
+if [ "$no" -lt 2 ]; then
+is_prime=false
+else
+for((i=2; i <=$((no/2)); i++));do
+if [ $((no % i)) -eq 0 ];then
+is_prime=false
+break
+fi
+done
+fi
+
+if [ "$is_prime" = true ];then
+echo "$no is prime"
+else
+echo "$no is not prime"
+fi
diff --git a/OS/bash/Week3/addq2.sh b/OS/bash/Week3/addq2.sh
new file mode 100644
index 0000000..6115a94
--- /dev/null
+++ b/OS/bash/Week3/addq2.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+echo "Enter a number"
+read no
+
+fact=1
+
+for((i=1;i <= no; i++));do
+fact=$((fact*i))
+done
+
+echo "The factorial is $fact"
diff --git a/OS/bash/Week3/addq3.sh b/OS/bash/Week3/addq3.sh
new file mode 100644
index 0000000..47f6103
--- /dev/null
+++ b/OS/bash/Week3/addq3.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+
+echo "Enter the text file"
+read file
+
+even_file="evenfile"
+odd_file="oddfile"
+
+line_no=1
+while IFS= read -r line;do
+if [ "$((line_no%2))" -eq 0 ]; then
+echo "$line" >> "$even_file"
+else
+echo "$line" >> "$odd_file"
+fi
+((line_no++))
+done<"$file"
+
+echo "Even and odd numbered lines transferres"
+
diff --git a/OS/bash/Week3/q1.sh b/OS/bash/Week3/q1.sh
new file mode 100644
index 0000000..e9c36c0
--- /dev/null
+++ b/OS/bash/Week3/q1.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+echo "Enter the name of item to be checked"
+read name
+if [ -f $name ]; then
+echo "File $name exists"
+elif [ -d $name ]; then
+echo "Directory $name exists"
+else
+echo "Neither file or directory"
+fi
diff --git a/OS/bash/Week3/q2.sh b/OS/bash/Week3/q2.sh
new file mode 100644
index 0000000..a2c73c1
--- /dev/null
+++ b/OS/bash/Week3/q2.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+echo "Which folder would you like to check?"
+read folder
+echo "Enter pattern/filename string to match"
+read string
+x=`find $folder -type f -iname "*$string*"`
+for i in $x;do
+echo "$i"
+done