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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.
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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?
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The area of the circular mirror is 64π. A circular edge will be inserted on the mirror. The area of the circular edge is 17π. What is the width of the edge?
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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.
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How many seconds does it take to drive 132 feet at an average speed of 50 miles/h?
(1 mile=5280 feets, 1h=3600s)
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n=?
1: The greatest common factor for n and 12 is 4.
2: The least common multiple of n and 12 is 60.
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The particle rotates around a fixed circular orbit. It just returns to the starting point after rotating for 300 miles(one circle). What is the radius of the orbit?
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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?
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The average speed of someone walking from A to B was 8 miles/h. He walked slower when he went back. How far did this man walk in all?
1: The man ran for 1 hour and 25 minutes.
2: The average speed of going back was 75% of that of walking from A to B.
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It takes 4 mins for ab to complete 10000 tasks together. It takes 3 minutes for abc to complete the same task together. How long does it take for c to complete the same task alone?
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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?
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The elements in set B are twice as many as those in set A, and the intersection of AB is empty. $$\frac{1}{3}$$of the elements in set C come from A, and $$\frac{1}{4}$$from B. What is the proportion of intersection of A and C in set C?
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What is the median of the numbers in the following table?
1:a=4
2:b=5
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9$$x^{2}$$-4$$y^{2}$$=189. x=?
1:3x+2y=21
2:3x-2y=9
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n is a positive integer. The product of the hundreds digit, the tens digit, and the unit digit is 54. What is the unit digit of n?
1: n > 950
2: The sum of the hundreds digit, the tens digit, and the unit digit is 16.
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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.
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There are 365 days in a year. October 21th is Friday, the 294th day. What day is the 365th day?
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Both J and A have some stamps. The ratio of the total number of stamps of J to that of A is 5:3. The total amount of J's stamps is 50 more than 5/9 of two people's stamps. How many stamps do A have?
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x,y≠0. Is $$\frac{x}{y}$$ +$$\frac{y}{x}$$ ≥ 2?
1:x < y
2:xy > 0
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$$(4^{3})^{2}$$*$$(5^{2})^{3}$$+$$16^{3}$$*$$(5^{3})^{2}$$=?
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