普吉岛悬崖餐厅:外国语学校考试问题,大家帮忙~

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1.有一种数我们称它为“天使数”,“天使数”同时具备以下性质:
(1)它与1的差是质数;
(2)它除以2所得的商也是质数;
(3)它除以9所得的余数是5.
请你找出在两位数中,最大的“天使数”是____________
2.请你将八个奇数:1、3、5、7、9、11、13、15填入下面八个空中.(不可以重复噢!)使算式的结果尽可能地大.请问你得到的最大结果是__________.
[O÷ O×( O +O)]-[O× O+ O- O]
3.Two little brothers,
One lives on one side,
The other on the other side,
They can hear what you say,
But they do not see each other.

What are they?
They are_________.

1.有一种数我们称它为“天使数”,“天使数”同时具备以下性质:
(1)它与1的差是质数;
(2)它除以2所得的商也是质数;
(3)它除以9所得的余数是5.
请你找出在两位数中,最大的“天使数”是14
2.请你将八个奇数:1、3、5、7、9、11、13、15填入下面八个空中.(不可以重复噢!)使算式的结果尽可能地大.请问你得到的最大结果是347
[O÷ O×( O +O)]-[O× O+ O- O]
3.Two little brothers,
One lives on one side,
The other on the other side,
They can hear what you say,
But they do not see each other.

What are they?
They are ears.

又是你,怎么不给我回信?

3.Two little brothers,
One lives on one side,
The other on the other side,
They can hear what you say,
But they do not see each other.

What are they?
They are ears.