1, fill in the appropriate numbers according to the law: 1, 4, 9, 16, 25, (
),49。
2, form an equation with 3, 8, 8 and 9, and the result is 24 (
)。
There are two baskets of apples. There are 67 apples in the first basket and 53 apples in the second basket. If you take out () apples from every second basket and put them in the first basket, you can double the number of apples in the first basket.
4, some soldiers lined up in a phalanx, because of the need of duty, that is, a row of soldiers were transferred to duty, so * * * left 27 people, and the original phalanx had () soldiers.
Aunt Li lives on the seventh floor. One day, it took her 30 seconds to walk from 1 building to the third floor. According to this calculation, Aunt Li still needs (
) seconds to get home.
6. The quotient of dividing two numbers is 3, and the remainder is 10. The sum of dividend, divisor, quotient and remainder is 143, so dividend is (
), the divisor is (
)。
7.
Can you put a plus sign or a minus sign in each bracket of the following formula to make the equation hold?
If you can, please fill in the plus sign or minus sign to make the equation hold.
If not, please explain why.
1(
)2(
)3(
)4(
)5(
)6(
)7(
)8(
)9(
) 10(
) 1 1(
) 12
=20
8.
There are seven students standing in a row facing the east.
Let four students turn around at a time, can seven students face west after turning around many times?
Why?
9.
In Class Five (1), 32 students like football and 27 students like basketball. There are 1 1 students who like both football and basketball. How many students in Class Five (1) like football or basketball?
10, when some people are shopping together, if everyone goes out of 8 yuan, there will be more 3 yuan, and if everyone goes out of 7 yuan, there will be less.
4 yuan. So * * * How many people go shopping together? How much is this commodity?
1 1.
A questionnaire survey was conducted among 100 college students. Among them, 5 students know neither English nor French, 95 students know English and 65 students know French. How many students know both English and French?
12.
A class of 45 students took the mid-term exam, among them, 20 were excellent in Chinese, 65,438+08 in math, 22 in English, 7 in Chinese and math, 6 in math and English, 8 in English and Chinese, and only 65,438+0 in the whole class failed to achieve Excellence in three subjects. How many people do you know?
13.
On the first day of the final exam, Xiaoming got 94 points in Chinese, 83 points in math and 86 points in English. How many points does he have to take in science the next day to make the average score of these four subjects reach 90?
14, a class of students went boating in the park. They calculated that if one more boat was added, each boat could only hold six people. If one boat is reduced, each boat can just take nine people. How many students are there in this class?
15, Xiaohua is 12 years old, and her mother is 48 years old. How many years ago, her mother was five times as old as Xiaohua? How many years later, my mother was three times older than Xiaohua?
16. A pasture is covered with grass, which grows evenly every day. This pasture can feed 10 cows for 20 days, 15 cows 10 days. Q: How many days can 25 cows eat?
17, workshop 1 and workshop 2 made the same kind of parts, 60 in workshop 1, 70 in workshop 2, and one * * *, and 8440 such parts were made. It is known that the first workshop has 28 more people than the second workshop. How many people are there in the two workshops?