2. The rabbit and the kitten go upstairs together. A kitten is twice as fast as a rabbit. When the rabbit went up to the fourth floor, the kitten went up to the () floor.
3. A kind of weed, which grows 1 time every day, can grow to 48mm in 12 days, and it takes () days to grow to 6 mm..
Xiao Qiang has two packages of sweets, one with 48 capsules and the other with 12 capsules. He took three capsules out of the extra package at a time and put them into fewer packages. After () times, the number of two packs of candy can be equal.
5. Write a string of numbers immediately after 4444, and each number written is a digit of the product of its previous two numbers. For example: 4×4= 16, write 6,4× 6 = 24 after 4, and write 4 after 6 to get a series of numbers: 4444644644 ... This series of numbers starts from 1 and counts to the right. The 444th digit is ().
6. Mom is frying eggs in the pot. Eggs should be fried on both sides. Fry each side for 30 seconds. This pot can only fry two eggs at the same time. It takes at least () seconds to fry three eggs now.
7. There are two piles of fruit, a pile of apples and a pile of pears. If 1 apple is replaced by 1 pear, there are two more apples. If 1 pear is replaced by two apples, there are 1 pear. Think about it, there are () apples and () pears.
8. A road has been built, with 2.6 kilometers left. It is known that there are 0.2 kilometers more unrepaired than repaired. The total length of this road is () kilometers.
9. A barrel of oil weighs 5.6 kg, and the barrel weighs 3. 1 g after half of the oil is used. The net weight of this barrel of oil is () kilograms.
10. pesticide plant produces a batch of pesticides with a daily output of 0.24 tons. If the price is 28.5 yuan per 500 grams. The value of pesticides produced by this factory every day is () yuan.
1 1. Knowing that the numbers A, B, C and D are not zero, we know that:
Number A ÷ B =0.5 number D ÷ B = 1.0 1 number c ÷ 0.4 = b.
A number ÷ 1.25= C number
Compare the sizes of four numbers, A, B, C and D, in descending order, and the third number is ().
12.3.704 The number after the decimal point of 100 is ().
13. 1993× 199.2- 1992× 199. 1=( )
14. 15.37×7.88-9.37×7.88- 15.37×2. 12+9.37×2. 12=( )
15. There are three people, A, B, C, A walks 50 meters per minute, B walks 40 meters per minute, and C walks 60 meters per minute. A, B set out from East Village, C set out from West Village, and set out at the same time. A meets C 40 minutes after takeoff, and B meets C 40 minutes after takeoff.
1 bus length190m, and truck length is 240m. The two cars are traveling at a speed of 20 meters per second and 23 meters per second respectively. How many seconds does it take to meet from front to back on the double-track railway?
An: 10 second.
2 calculation1234+2341+3412+4123 =?
An:1110
The first item in arithmetic progression is 5.6, and the sixth item is 20.6. Find its fourth project.
An: 14.6
The sum of 4 is 0.1+0.3+0.5+0.7+...+0.87+0.89 =?
Ann: 22.5
5 Solve the following congruence equations:
(1)5X≡3 (module 13) (2)30x≡33 (module 39) (3)35x≡ 140 (module 47) (4) 3x+4x ≡.
An: (1) x ≡11(mod13) (2) x ≡ 5 (mod 39) (3) x ≡ 4 (mod 47) (4) x.
Can the number 220652532 1 be divisible by 7113?
Ann: Yes.
There are 1.2.5 cent coins * * 100, with a total value of * * 2 yuan. It is known that the total value of 2-cent coins is more than 1 cent coins 13 cents. How many coins are there in each of the three types?
An: 5 1 `one cent, 32 dimes, 17 dimes.
8 Find a rule to fill in the numbers:
0, 3, 8, 15, 24, 35, _ _ _, 63 A: 48
How many parts can a 9 100 straight line divide a plane into at most?
An: 505 1
10 A B Two people went to the ocean, each with 12 days of food, and they explored for _ _ _ days at most.
Ann: Eight days.
The number of all natural numbers in the range of 1 100 that can be divisible by 2, 3, 5 or 7.
An: 78
12 1/2 + 1/2+3 + 1/2+3+4 + ......+ 1/2+3+4+....+ 10=?
An: 343/330
13 Choose at most a few numbers from 1, 2, 3, ... 2003, 2004, so that the difference between any two numbers is not equal to 9?
An: 1005
14 Find all the divisors of 360. Ann: 24
15 parking lot, with 24 cars, four wheels for cars, three wheels for motorcycles and 86 wheels for tricycles. An: 10 vehicle.
16 divisor * * * The smallest natural number with 8 is _ _ _ _. Ann: 24.
17 Find the sum of all two digits divided by four plus one, an; 12 10
18 points, one bonus will be given to Group A and Group B, with an average of 6 yuan per person. If only group A gets 10 yuan, only group B gets _ _ _ yuan.
Ann: 15 yuan.
19 has a factory spring outing. There are several cars with 65 people each, 15 people can't go. There are five more people in each car, leaving one car. There are _ _ _ _ _ cars and * * people.
An: 17, 1 120
Twenty students from AB two cities went to visit C by bus, and each bus can take 36 people. After students from two cities in AB filled several cars, the remaining students from A 1 1 and other students from B filled one car. At location C, students from A and B take pictures in pairs, and each film can only take 36 pictures. Then, when all the photos are taken, you can shoot the residual film in the camera.
An: 13 sheets.
Is 2 1 36A+4/24A+3 the simplest score?
Ann: Yes.
The volume of a cuboid is 374, its length, width and height are prime numbers, and its surface area is _ _ _.
Find the greatest common divisor of 1246 and 624. Ann: 2
24 Xiaoxi bought coconuts and mangoes, * * * used 43 yuan, 7 yuan for coconuts and 5 yuan for mangoes. She bought coconuts and mangoes, and the kilograms are all integers. So he bought * * * _ _ kilograms of coconuts and mangoes.
Ann: 7
25 100 chickens peck 100 grains of rice. The big chicken pecked 3 grains of rice, the middle chicken pecked 2 grains of rice, and the chicken pecked rice 1/3 grains, so there were only * * * _ _ _ _ chickens. An: 60 or 63 or 66 or 69 or 72 or 75 (the answer must be complete).
The sum of all the divisors of 26 in 2002 is __ AN:33.
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