Login to favorite
If a is a positive integer, and if the units digit of 
is 9 and the units digit of 
is 4, what is the units digit of 
?
is 9 and the units digit of is 4, what is the units digit of ?You cannot left this question unanswered!
Your time ran out! You will go to the next section.
Click Yes to confirm your answer and continue to the
next question.
- 右上角的时钟图标点击可以打开和关闭计时器
- 右上角的文件夹图标点击可以打开和关闭当前题号
- 题目右上角的星星图标点击可以收藏题目，所有被收藏
的题目均可在“我的记录”-“收藏夹”中找到 - 点击右下角的Next图标可以进入下一题。注意：如果你
没有做当前题目，你将不可以进入下一题 - 点击左下角的Quit或EndExam图标即可退出。注意：
如果你选择退出考试，那么你的本次考试将不被记录