Brain Games, Number Search Puzzles | Mixed Operations : Addition,Subtraction,Multiplication, Division (Hard Level) 660 Questions (61 Puzzles)Are you ready to play the game? Welcome to the new super challenge with this amazing game, Number Search Puzzle by Mixed Operations! For this game, you have to solve the problem before you can find the number. Containing numbers finds puzzles covering 660 questions or hidden numbers, you will have fun with the game for 601 puzzles. This book is perfect for