请教一道高中数学题

[Jenny_Hull]

Which of the following is a perfect square (no calculator allowed!!!)?



329476, 389372, 964328, 326047, 724203



Write sentences to explain your answer.

 

[Perfectionism]

329476

The unit digit for a square can only be 1,4,5,6,9.

 

[Jenny_Hull]

329476



The unit digit for a square can only be 1,4,5,6,9.

Thanks a lot

 

[mayo_wang]

You miss 0.

Not for picky. thanks.

329476

The unit digit for a square can only be 1,4,5,6,9.

 

[ten]

一秒钟出结果，看来我宝刀未老。

 

[Perfectionism]

Not for picky. thanks.

You are right。 Thanks

 

[好玩儿]

为什么呀？不明白？6是完美平方数吗？

 

[CCD]

为什么呀？不明白？6是完美平方数吗？

用的是排除法。