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191031
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Is the y-coordinate of the intersection of a parabola and the y-axis greater than 0?
(1)The intersection with the X-axis is -3 and 5
(2)The maximum value is 12
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191031
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n is a two-digit number, 30≤n≤80, is the single digit of n equal to 2?
(1). Both single and tens digits are prime numbers
(2). The sum of N's tens digit and units digit is a prime number
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191031
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Five numbers v，w，x，y，z. Is the median of the five numbers equal to its mean?
(1). v < w < x < y < z
(2). w-v = x-w = y-x = z-y
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191031
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What's the variance of four numbers 9, 8, 7, 4?
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191031
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How many prime factors does 2730 have?
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191031
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There are 30 customers in a bakery. Each of them buys either bread or coffee. Which of the following CANNOT be the difference between the number of people buying bread and the number of people buying coffee?
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191031
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If k=0.0004, which of the following has the greatest value?
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191031
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It takes 10 hours for machine A and machine B to finish a certain job together. The working speed of A is 5 times faster than B. So how many hours does it take for A alone to do the same job?
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191031
|
There are 5 numbers, is the range > 40?
(1)Median=70
(2)Mean=50
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191031
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An obtuse triangle has three sides, and the length of each side is 40, 9 and x. Which of the following could be the possible value of x?
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191031
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The sum of x and y is a prime number, is the sum of x and y odd?
(1)x is odd
(2)y>2
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191222
|
x^5+2x^4+x^3>0?
Condition 1：x > -1
Condition 2：x < 0
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191222
|
BR∥AC.Is PA an Angle bisector?
Condition 1：∠PQR=∠PAC
Condition 2：∠PQR=∠PAB
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191222
|
Is c/b a terminating decimal?
(1)c is a mutiple of 60
(2)b is a mutiple of 250
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191222
|
Each of the three machines works at the same constant rate. It takes k hours for two machines to produce goods. It takes 2 hours less for three machines than for two machines to produce same amount of goods. What is the value of k?
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191222
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Tom spends $8.5 on three bottles of beverage and one box of popcorn. Jim spends $10.5 on one bottle of beverage and two boxes of popcorn. How much does one bottle of beverage and one box of popcorn cost?
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191222
|
A school holds seven meetings from Monday to Friday, at least one meeting every day. How many meetings are held on Wednesday?
1: The numbers of meetings on Monday and Wednesday are the same
2: The number of meetings on Wednesday is more than on Tuesday
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200301
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January (A), February (B) and March (C) total $1200. Where A: (B + C) = 5:7, B: (A + C) = 9:15 how much is March?
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200301
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What is the maximum prime factor of $$2^{32} +4^{16} +8^8$$?
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200301
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A person starts at 6:30, the whole distance is 500km, and stops at half the distance. What time does this person arrive at the destination?
(1)It's 10:30 at half way
(2)50 km/h for the remaining half of the journey
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