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191031	In the figure above, what is the value of (R50, C3) ?
191031	A represents all multiples of 3 from 1 to 50 (inclusive), B represents all multiples of 5 from 1 to 50 (inclusive). How many numbers are there in the set of A and B?
191031	Given q = (10k-n) / 7, where q is a positive integer, and k , n are positive integers less than 7, what is the maximum value of q?
191031	One person is prepared to complete 4 tasks, named, A,B,C,D . How many different ways can A be completed before B?
191031	What is the value of remainder when 2 ^ 5550 is divided by 7?
191031	A has worked for 18 hours and B has worked for 6 hours. A is three times more efficient than B. So , what the fraction of (A + B) `s total workload is B`s total workload ?
191031	ABCE and AFCD are two rectangles, E is on FD, AB = 1, BC = 2, What is the area of rectangular AFDC.
191031	There are three different prices, price B is 10% higher than price A, and price C is 15% lower than price B. What is the ratio of price C to price A?
191031	It is given that: 2 / k + 4 / m = r / s, where r / s is the fraction in lowest term, Is s = km? 1. k and m are prime numbers 2. k and m have no common factors except 1.
191031	There are 5 green balls and 5 white balls in the box, numbered 1.2.3.4.5. Now a white ball and a green ball are taken away. What is the number on the green ball taken? 1: If one ball is selected from the remaining balls, the probability of selecting an even green ball is 1/8. 2: If one ball is selected from the remaining balls, and the probability of taking "4" is 1/4.
191031	A number can be divided y 2 ^ 7 * 3 ^ 2 * 5 ^ 4 and 3 ^ 4 * 5 ^ 7 * 11 * 13 at the same time. How many common divisors other than 1 such number has at most ?
191031	The probability that event A will occur is 0.6, and the probability that event B will occur is 0.45. What is the probability that both A and B will occur at same time? 1.Such two events are independent of each other. 2.The probability that neither of A and B will occur at the same time is 0.22
191031	There are 50 people in total, of which 18% have no cell phone, 20% have no computer, and 4% have neither cell phone nor computer. How many people have both a mobile phone and a computer?
191031	A composition is 96 pounds and contains W, X, Y, Z, where W:X:Y = 1:3:4, Y:Z = 5:2. how many pounds Y is?
191031	A person works five days a week with basic salary of $ 70 per day. Then on any day if the sales reach $ 500 , he will be rewarded with 5% of the sales for that day. So did his income last week exceed $450. 1.His sales exceeded$500 for four days in a week 2. One day in a week he sold $ 1500
191031	There are now 1,000 students, whose average grade is 5 and the standard deviation is 1. So how many students have a grade greater than 4. (68% of the distribution lies within 1 standard deviation of the mean.)
191031	There is a round table with a radius of 30 inches. A group of people are sitting around and are required to sit at least 30 inches apart. So how many people can sit at most?
191031	Is the number of the roots of $$x^2-4x+c=0$$ greater than 1? (1)C≥-4 (2)C≤4
191031	There are 10 cards numbered 1-10, respectively. 5 different cards are selected randomly from these 10 cards. What is the greatest value of difference between median and mean?
191031	A square is inscribed with two same circles whose radii are all r. If r=$$\sqrt{2}$$, what is the length of the diagonal of this square?