The fruit shop in Shaling Town brought 40 baskets of fruit, of which pears accounted for (1/10), apples (3/8), bananas (2/5), and the rest were oranges. Please ask three mathematical problems and try to solve them.
沙岭镇水果店运来40筐水果，其中梨占(1/10)，苹果占(3/8)，香蕉占(2/5)，其余是橘子．请你提出三个数学问题，并尝试解答．
<result>5</result>