1. In a music instrumental store, there are 6 displays and in each display, there is one violin.
(a) The total number of violins in the store \(=\) .
(b) The property of integers used to solve the problem is .
2. A group game can be played with a minimum number of players equals 10. But on a particular day, only 5 players have joined in the game.
(a) The number of players still required to play the game on that day is .
(b) The property of integers used to solve the problem is .