Mix 10 small sticks of each of the three colors of red, yellow and blue and put them together. If you are asked to close your eyes, at least how many sticks can be taken out to ensure that there must be 2 small sticks of different colors.
红、黄、蓝三种颜色的小棒各10根混放在一起．如果让你闭上眼睛，至少拿出多少根才能保证一定有2根不同色的小棒．
<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<result>11</result>