奥数题有用英语出的，也要用英语回答的。怎么样，弄几道玩玩。

这些题在综合能力训练中都有。.

应用题：

Lily and sue go to the garden. Lily picks 36 apples. Sue gets 24 pears. They exchange the fruits. Every time Lily gives Sue 3 apples and Sue gives 6 pears back to her. How many turns of such exchanges will make the fruits of Lily's three times as many as Sue's?.

a hare and a tortoise are racing. They should cover a distance of 2,000m. the tortoise walks at a speed of 25 m per minute,while the hare can run at a speed of 325 m per minute. But the hare thinks he runs much faster than the tortoise, and he has a sleep during the way to the end. As a result, when the tortoise arrives the hare may have 400 m to go.

Question: How many minutes does hare sleep?

Answer:   __________minutes..

Here are some red, white and black balls. The sum of the white and red balls os 10, and the sum of the red and black ones is 7, the black and white ones is 5.

Question: How many balls of each color?

Answer: ________.