There are 4 balls in the box, labeled 1, 2, 3, 4. Each time two balls are drawn out, their serial numbers are subtracted (big reduction), then the possibility of the difference is the greatest.
盒子中有4个球，标号分别为1，2，3，4．每次摸出两个球，将其编号相减(大减小)，则差是多少的可能性最大．
<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<result>1</result>