Challenge your mind while looking for number sequences in this challenging book of number search puzzles. There are 150 puzzles, with answers, to keep you entertained for hours.
If you like a challenge, check out these books:
If you have an Android device, check out my FREE app
Games By Nilo - Number Fill In (https: //play.google.com/store/apps/details?id=com.gamesbynilo.numberfillin)