diff --git a/hw3_ex10.sh b/hw3_ex10.sh
new file mode 100644
index 0000000..9214766
--- /dev/null
+++ b/hw3_ex10.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+uniq_colors=$( awk -F';' '!seen[$5]++ {if($5!="color")print($5)}' test.txt )
+for i in $uniq_colors
+do 
+	COUNT=1
+	awk -v s=$i -v COUNT=$COUNT -F';' '{ if ($5==s) {{ COUNT++ } if (COUNT%2==1) {var1=sin($4)/cos($4); printf($2"\t"); printf("%.4f\n",var1)} } }' test.txt
+done
diff --git a/hw3_ex6.sh b/hw3_ex6.sh
new file mode 100644
index 0000000..7696510
--- /dev/null
+++ b/hw3_ex6.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+read WORD
+REV=$(echo $WORD | rev)
+echo $REV
+if [ "$REV" = "$WORD" ]
+then
+    echo '**YES**'
+else
+    echo '**NO**'
+fi
diff --git a/hw3_ex7.sh b/hw3_ex7.sh
new file mode 100644
index 0000000..9ba0068
--- /dev/null
+++ b/hw3_ex7.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+while IFS= read -r line; do
+    factor $line >> $2
+done < $1
diff --git a/hw3_ex8.sh b/hw3_ex8.sh
new file mode 100644
index 0000000..c54de7d
--- /dev/null
+++ b/hw3_ex8.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+find . -type f -mtime -2 ! -mmin -1 ! -name '*.sh' -print0 | 
+    while IFS= read -r -d '' line
+    do
+        part1=$(dirname "$line")
+        part2=$(basename "$line")
+        mv $line $part1'/'$add$part2
+    done
diff --git a/hw3_ex9.sh b/hw3_ex9.sh
new file mode 100644
index 0000000..a84e10f
--- /dev/null
+++ b/hw3_ex9.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+s=$(cal|cat -vet|grep -o '_^H.'|grep -o '[[:digit:]]')
+echo $s | sed 's/ //g'