Select four numbers from the five numbers 1, 2, 3, 4, and 5 to form a number that can be divisible by both 3 and 5. What is the number that should be removed?
从1、2、3、4、5五个数字中选用四个数字组成一个能同时被3和5整除的数，应该去掉的数字是多少．
<result>3</result>