The given sequence is .
Find a pattern:
The numbers increase by 2,3,4 and 5.
Conjecture: The next number will increase by 6.
So, the next number is 18 + 6 = 24.
The sequence is , 24. \ \
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f6d329e0d297d44c924785dbf239af11.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5e98eb2230f5b7170e52569687d16c6b.png\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
, 24. \ \