只要五根即可
有以下几种情况:(红黄蓝绿红)(红黄蓝绿黄)(红黄蓝绿蓝)(红黄蓝绿 绿)
还有(红红红蓝黄)(红红红黄绿)(红红红蓝绿)(红蓝蓝蓝黄)(红蓝蓝蓝绿)(黄蓝蓝蓝绿)(红蓝黄黄黄)(红绿黄黄黄)(蓝绿黄黄黄)(红红红红蓝)(红红红红黄)(红红红红绿)(蓝蓝蓝蓝红)(蓝蓝蓝蓝黄)(蓝蓝蓝蓝绿)(绿绿绿绿红)(绿绿绿绿黄)(绿绿绿绿蓝)(好红红红红)(黄黄黄黄黄)(蓝蓝蓝蓝蓝)(绿绿绿绿绿)所以只要拿五根就有至少两根颜色相同.
只要五根即可
有以下几种情况:(红黄蓝绿红)(红黄蓝绿黄)(红黄蓝绿蓝)(红黄蓝绿 绿)
还有(红红红蓝黄)(红红红黄绿)(红红红蓝绿)(红蓝蓝蓝黄)(红蓝蓝蓝绿)(黄蓝蓝蓝绿)(红蓝黄黄黄)(红绿黄黄黄)(蓝绿黄黄黄)(红红红红蓝)(红红红红黄)(红红红红绿)(蓝蓝蓝蓝红)(蓝蓝蓝蓝黄)(蓝蓝蓝蓝绿)(绿绿绿绿红)(绿绿绿绿黄)(绿绿绿绿蓝)(好红红红红)(黄黄黄黄黄)(蓝蓝蓝蓝蓝)(绿绿绿绿绿)所以只要拿五根就有至少两根颜色相同.