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181215
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There are two kinds of coins in the piggy bank, 30 cents and 24 cents. How many coins are there of each kind?
Condition 1: All coins add up to 102 cents.
Condition 2: There are 4 coins in the piggy bank.
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190603
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Is n the difference between two prime numbers?
1: n = 11
2: (n-7) (n-11) = 0
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181215
|
Line L goes through (r,s). Is r > s?
1: r > 0
2: The slope of is negative.
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190124
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N is divisible by 5. what is N?
1：When N is divided by 4, the remainder is 3.
2：N is divisible by 3.
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190124
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A positive integer N is a multiple of 5. What is the remainder of N divided by 6?
1: When N is divided by 4, the remainder is 3.
2: When N is divided by 12, the remainder is 3.
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第一期
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Two drivers, A and B, drive at their respectively constant speed on the same road. At a certain time, the distance between A and B is 10miles. How long does it take B to catch up with A from that time?
(1)A is 10mph slower than the highest speed while B is 10mph faster than the highest speed
(2)B is driving speed 65mph.
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第一期
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There are 20 cars in a taxi company. The number of blue cars is greater than 10. The rest are exactly red and green cars, and the number of cars of each colors is greater than 0. How many are there in green?
(1) The number of green cars is five times that of red cars.
(2) The total number of green cars and red cars is 6.
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第一期
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It took a total of 5 hours for S to drive from station x to station y. How long does it take for him to go for the first 200 miles?
(1)The average speed of the first three hours of S is 80miles/h
(2)The average speed of the last two hours of S is 90miles/h
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190603
|
The three heights of a triangle are M, H, and K. Is the perimeter of this triangle greater than 6?
(1)M>2
(2)K+H>4
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190113
|
If uv > 0, is ($$u^{2}$$) ($$v^{3}$$) >0？
(1)u > 0
(2)v > 0
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190113 还原机经选题: 数论&代数
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X is a set that composed of consecutive integers. How many numbers are there in X?
(1)There are 71 numbers that can be divided by 3 in X.
(2)There are 106 even integers in X.
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190113
|
According to the picture, AB=BC. O is the center of the circle, and A, B, C, and D are all on the circle. EF is tangent to the circle O at point B. ∠ABE=？
(1)The point O lies on the line AC.
(2)∠CAD=24°
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190113
|
If x, and y are positive integers, is even?
(1)x=3
(2)y=2
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190113
|
If m, and n are positive integers, is $$\frac{m!}{n!}$$ > $$n^{3}$$?
(1)m-n ≥ 3
(2)m=3n
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190113
|
If x, y, and z are positive integers, x+y+z=?
(1)xyz=154
(2)x-y-z=2
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190113 还原机经选题: 文字题&几何
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A total of 100 people participated in a survey. Thirty people bought milk. How many people bought both milk and orange juice?
(1) 40 people bought orange juice.
(2) There were 50 people who bought exactly one of these two drinks.
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190113
|
There is a rectangle. The length of this rectangle is L, and the width is W. This rectangle has the same area as a square. What's the difference between the circumference of a rectangle and that of a square?
(1) $$\sqrt{L}$$ - $$\sqrt{W}$$ = $$\sqrt{2}$$
(2)$$\sqrt{L}$$ + $$\sqrt{W}$$ = $$3\sqrt{2}$$
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190113
|
A car passes through three points A, B and C on a road, successively. The average speed of a driver driving through AC was 20 feet/second. What's the average speed he drove through section BC?
(1)The average speed he drives through section AB was 10 feet/second.
(2)It took him 20 seconds to drive through section BC.
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190207
|
In rectangular ABCD, ab = 10, BC = 6. What is the area of the shaded area?
1：l=0.8
2：∠d=30°
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190321
|
Is $$x^4
1:$$x^4
2.$$x^3 < y^4$$
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