|
190603
|
The tailor shop needs to make 100 square handkerchiefs with a side length of 16 inches. The tailor shop can choose two different types of fabrics for processing. The length of the fabric A is 1 yard and the width is 26 inches, and the length of the fabric B is 1 yard and the width is 44 inches. The price of one piece of fabric A is $ 5, and the price of one piece of fabric B is $ 9. The tailor shop can't piece piecemeal fabrics together to make handkerchiefs. How much less is buying fabric B for handkerchiefs than buying fabric A for handkerchiefs? (1yard = 36 inches)
|
|
181215
|
What's the hundred-digit number of 13467*$$\frac{10^{6}-10^{4}}{10^{5}}$$？
|
|
181215
|
Six geometric puzzles are arranged in a row, including three identical squares, two identical circles and one triangle. How many different arrangements are there?
|
|
181215 KMFPS
|
If n is a positive integer, what could the unit digit of n(n+1)(n+2)(n+3)(n+4)?
|
|
181215
|
The price of a coat is $90 in April and $80 in May. What's the total income in May?
1: The sales in May is 70% of that in April.
2: 170 coats were sold in April.
|
|
181215
|
A={1,2,3,4,5}, B={1,2,3,4,5}. Take a number from sets A and B respectively. What is the probability that the product of these two numbers is less than 4?
|
|
181215
|
A dice with even texture can be red, blue or green on each side. How many sides are red?
1: Throw the dice twice. The probability of a blue side facing up for the first time and a green side facing up for the second time is 1/18.
2: Throw the dice twice. The probability of a red side facing up for the first time and a green side facing up for the second time is 1/6.
|
|
181215
|
How many seconds does it take to drive 132 feet at an average speed of 50 miles/h?
(1 mile=5280 feets, 1h=3600s)
|
|
181215
|
Three bags, A,B,C, contain balls of the same size. There are 9 white balls and 1 green ball in A. There are 8 white balls and 2 green balls in B. There are 7 white balls and 3 green balls in C. A ball is taken randomly from each bag. What's the probability of taking at least one white ball?
|
|
181215
|
There are 7 rods in total. 2 rods are 5 in length. 3 rods are 4 in length and 2 rods are 2 in length. The seven rods are put into three bobbins. What is the minimum possible sum of the length of the rods in the bobbin where the length of the rods is maximum?
|
|
181215
|
The price of a sofa is 500 dollars and that of a chair is 200 dollars. How much did a person buy each?
1: It costs 1200 dollars to buy sofas and chairs.
2: More than 1 sofa was purchased.
|
|
181215
|
CE=6, AB//CD. EF=？
1：AC:CE=1:2
2：CD//EF
|
|
190124
|
$$ hw \neq 0$$,f(x)=-$$x^{2}$$+1,is $$\frac{f(w+h)-f(h)}{h}$$ > $$\frac{f(w+h)+f(h)}{h}$$？
1：0 < h < 1
2：w < 0
|
|
190124 还原机经选题: 文字题&几何
|
Does the parabola y=a$$x^{2}$$+bx+c intersect with x-axis?
1: a < 0
2: c > 0
|
|
190124
|
Five numbers are chosen randomly from 1 to 20 (boundaries are included). What's the probability that the five numbers include both 10 and 20?
|
|
190124
|
The radius of a balloon was x. After air letting out, the volume was reduced by 27.1%. If the balloon is always sphere. What's the functional relationship between the radius r after leaking and the original radius x?
|
|
190124
|
Is $$\frac{x^{2}}{x^{\frac{2}{3}}}$$ ？
1：$$x^{2}$$-3x+2 > 0
2：$$x^{3}$$ > x
|
|
190124
|
How many factors does 336 have?
|
|
190124
|
It takes a person 15 minutes from home to the store and 25 minutes from the store to home. The distance from home to the store is 2km. What is the average speed of this person in two sections?
|
|
第一期
|
$$S_{1}=1$$,$$S_{2}=2$$,$$S_{3}=(S_{2})^{S_{1}}=2^{1}=2$$,$$S_{n}=(S_{n-1})^{S_{n-2}}$$,$$\frac{S_{6}}{S_{5}}=$$
|