克罗斯比英数学题

2020年11月25日发(作者：闵珪)

南外英语综合训练
1、It is now four fifteen in the afternoon. Mrs. White finished her book a quarter of an
hour ago. At what time she finished it?
2、What is supposed to be the next number?
14, 29, 88, 353 .
3、Haretown and Tortoiseville are 99 miles apart. A hare travels at 10 miles per hour
from Haretwn to Tortoiseville, while a tortoise travels at 1 mile per hour from
Tortoiseville to Haretown. If both set out at the same time. How many miles will
the hare have to travel before meeting the tortoise?

4、Xiao Ming’s father is 3.2 times as old as Xiao Ming, while his mother is 2.6 times
as old as Xiao Ming. As is known that his father is 9 years older than his mother,
how old is Xiao Ming?

5、There are 6 seats at each table for the big outdoor party. All of the tables and chairs
have 4 legs each, and altogether, the tables and chairs have a total of 196 legs. If
there is one seat for each person who will attend，how many people are expected
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to come to the big party?

6、In one school, the average age of the men teachers is 27，the average age of women
teachers is 32, and the average age of all the teachers is 30. If the men teachers are
13 people less than the women teachers. How many teachers are there in that
school?

7、There are 30 marbles with the same size in a box, in which there are 10 red ones, 8
white ones, 7 yellow ones and 5 green ones. How many marbles should be taken
out at least at a time so as to make sure there are 7 marbles with the same color
without opening eyes?

8、There are 40 continuous natural numbers，among which the largest one is 4 times as
big as the smallest one Question: What is the sum of the largest one plus the
smallest one?

9、Fill the blanks in the sequence：2,5,15, ,54, ,171
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10、Alice goes for a walk from her home. She walks 12km east, 5km south and 12km
west. How far is she from her home now?

11、If 10⊙3=1,152⊙7=5,and then 379⊙6 equals .
12、An ant covers a distance of 90 meters in 3 hours. The average speed of the ant in
decimeters per minute is .
13、If a⊕b=(3×b)then the value of 2+(2×a)⊕(3⊕5)is .
14、 continuous natural numbers make a sum of 300. What is the largest one among
the series?

15、I have a jar of sweets. There are 234 red, 26blue, 67 green and 63 yellow sweets.
What chance（机会）do I have picking a blue one with my eyes shut？

16、If number A minus the product of 3 times as big as B, the result will be 51. If
number A plus the sum of 2 times as big as B, the sum will be 111. Question:
What is A? What is B?

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