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190321
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The slopes of lines $$l_1$$ and $$l_2$$ are larger than 0. The y-intersection of both lines are larger than 0. Is the x-intersection of $$l_1$$ larger than that of $$l_2$$?
1: The y-intersection of $$l_1$$ is larger than that of $$l_2$$.
2: The slope of $$l_1$$ is smaller than that of $$l_2$$.
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190415
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As shown in the figure, there are two semicircles and one circle in rectangle ABCD. The whole circle is tangent to two semicircles. The square EFGH is inscribed to the circle. What is the area of the shaded area?
1: EF=2
2: The area of ABCD is 16.
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190207
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Is the quadrilateral square?
1: The lengths of two diagonals are equal.
2: The two diagonals are perpendicular to each other.
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190207
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There are three points in the xy-plane, A(a, b), B(c, d), C(d,c). Is AB=AC?
1:($$a^{2}$$-$$b^{2}$$)($$c^{2}$$-$$d^{2}$$)=0
2:($$a^{2}$$+$$b^{2}$$)($$c^{2}$$+$$d^{2}$$)=0
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190207
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Is the y-intercept of line l greater than 4?
1: The intercept of line l is equal to that of line y = 2x + 3.
2: The slope of line l is 5
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190207
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Is 3 a factor of n?
1: 2n can be divided by 6.
2: 3n can be divided by 6.
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190207
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What is the value of mn, if m,n are natural numbers.
1：$$2^{n}$$=$$3^{m}$$
2：$$m^{2}$$+$$n^{2}$$=5
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190207
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f(x)=p$$x^{2}$$+2qx+2. Does the function intersect the x axis at two different points?
1：$$p^{2}$$ > q
2：$$q^{2}$$ > p
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190207
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x < $$\sqrt{\frac{1.22}{1.68}}$$?
1:x < $$\frac{11}{13}$$
2:x < $$\frac{ \sqrt{3}}{2}$$
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190207
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The distance between the bottom of the two wires is 60m. What is the top distance between the two wires?
1: The difference between the height of two lines is 25m.
2: The sum of the height of the two lines is 70m.
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190113
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The ages of the three children are consecutive even numbers. How old is the oldest child?
(1) After 18 years, the sum of three children will be 2.5 times of that of the present age
(2) The youngest child after 5 years will be 7 years old.
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190113
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A clock recorded the end of a meeting that is 10:08 in the morning. How long did the meeting last?
(1) The meeting started at 8:00 in the morning that morning.
(2) The hour hand went 64 degrees in total during the meeting.
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190113
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A, B and C are positive integers. If A+B+C is even, is A+B+C a multiple of 4?
(1) A=B=C
(2) A,B,C are even.
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190113
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Is |xy|+xy ≤ 0？
(1)|x|+xy ≤ 0
(2)|y|+xy ≤ 0
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190113 还原机经选题: 文字题&几何
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There are 21 employees in a company. According to the following conditions, can it be determined that the median annual salary of these people is less than $40,000?
1: The annual salaries of 12 people are less than $37,000.
2: The annual salaries of 9 people are greater than $41,000.
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190113 还原机经选题: 文字题&几何
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The equation of a line is dx-by+c=0 (b≠0). What is the slope of the line?
(1)b+d = 10
(2)b/d = 4
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190113
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Given the distance between the starting point and the ending point on the map, what's the speed of a person driving this distance?
(1) The scale of the map is given.
(2) How long does it take for this person to drive from the starting point to the destination.
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190113
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According to the picture, BD=10. AC is perpendicular to CD. BC is perpendicular to AD. CD=?
(1)θ =60°
(2)AD=2AC
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190124
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What is the unit digit number of $$2^{k}$$ ?
1: k can be divided by 10.
2: k can be divided by 4.
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190124
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All numbers in a set are positive. The numbers in the set can be expressed as n/n+1. n is a natural number. Is there at least one number in the collection greater than $$\frac{19}{24}$$?
1: $$\frac{5}{6}$$ is in the set.
2: There are five different numbers in the collection.
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