A game of the famous pencil puzzle that fills the numbers according to the rules in the squares that are lined up vertically and horizontally. Since the total value is displayed for each vertical and horizontal column, add the numbers and apply the numbers to the squares. It is a puzzle that requires little calculation and requires attention and reasoning rather than calculation, so even those who try it for the first time can easily play it. All 50 questions are recorded, and it is one that you can play for a long time.