问题 填空题

一个三位数,百位上既不是质数也不是合数,十位上是最大的奇数,且这个数又是2和3的倍数,这个三位数是______或______.

答案

1既不是质数也不是合数,即百位上的数字是1,最大的一位奇数是9,即十位上的数字是9,因为既是2的倍数又是3的倍数,个位上的数字必须是偶数,且各位上的数字之和是3的倍数,所以这个三位数是192或198.

故答案为:192或198.

阅读理解

He was a single father, raising a 5-year-old boy alone. He worried about his son growing up without a mother to care for him.

One day he went away on business, leaving the child alone. He was worried about the child all the way, not knowing if he had eaten. But his child always told him not to worry. He went home quickly after finishing his work.

When he got home, the child was deep asleep. He was tired out. When he was about to sleep himself, he was surprised to find an overturned bowl of noodles under the quilt. He spanked his sleeping son angrily:"Why are you so naughty, making the quilt dirty? Who will wash it?" It was the first time that he had hit his boy after his wife's death.

"I haven't," the boy explained with tears in his eyes. "This is your supper, Daddy." In order to let his father eat dinner as soon as he got home, the boy cooked two bowls of noodles: one for himself, the other one for his father. He was afraid his father's noodles would get cold, so he placed them under the quilt to keep them hot.

Hearing this, the father hugged his boy tightly without saying a word.

小题1:According to the passage we know the boy only had _________.

A.a grandfather

B.a mother

C.a father

D.a grandmother小题2:The single father was always worried about ______.

A.his work

B. his money

C.his son

D.his quilt小题3:When the father got home , __________________________

A.His son wasn't at home.

B.He was tired out

C.His son was doing his homework

D.He was very happy.小题4:When the father knew the truth, _________.

A.He hit his son

B.He was very upset.

C.He hugged his son tightly.

D.He went outside.