There are 5 white balls and 5 red balls of the same shape and size in a box, and they are placed together in a messy manner. At least how many balls must be drawn to ensure that two balls of different colors are drawn.
盒子里有形状大小完全一样的白球和红球各5个，杂乱的放在一起，至少要摸出多少个球，才能保证摸出两种不同颜色的球．
<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<result>6</result>