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190321	$$2^{x+y}*2^{-(x-y)}$$ = ? 1:x=2 2:y=4
190321	What is the sum of the interior angles of the octagon?
190321	The cylinder contains a total of 24 gallons of oil. The machine consumes 1.6 ounces per minute. After 12h, how many gallons of oil are left in the cylinder? (1 gallon =128 ounces)
190321	The portion of the iceberg that is out of the water accounts for 1/8~1/7 of the total volume of the iceberg. What is the ratio of the part of the iceberg above the water to the part below the water?
190321 还原机经选题: 文字题&几何	It took 2.4 hours for A and B to perform A task together. If A and B perform the same task alone, the time that B spent was 1.5 times as much as that of A. How many hours did it take B to perform this task alone?
190321 还原机经选题: 文字题&几何	The iron ball with radius r was recast into a cylinder with radius R and height H. H=12R. H/r=?
190321	x,ware integers.$$x \neq 0. Is $$x^w$$ an integer? 1:w>0 2:x>0
190321	Every number in the set S is different. The set S contains all the solutions to (n-3)(n-5)(n-8) = 0. If a number will be picked from the set, what is the probability that this number satisfies the equation (n-3)(n-5)(n-8) = 0? 1: The numbers in the set are continuous. 2: There are 20 numbers in the set.
190321	ABCD is a parallelogram. BF=2. AE=？ 1：∠ABE=10°；∠CBF=30° 2：∠ABC=40°；∠BAD=140°
190321	The length of the three sides of a right triangle is x,2x+2,2x+3. What is the area of the right triangle?
190321 还原机经选题: 文字题&几何	The probability of selecting each path is 1/2. What's the probability of getting to L from A?
190321	X and Y are two discrete primes. X=?, Y=? 1:X-Y=5 2:X+Y=9
190321	Five spaces will be filled with numbers 1-5 at random and use each number only once. What's the probability that these 5 numbers are arranged in order from large to small or from small to large?
190321	What is the length and width of a rectangle? 1: The perimeter of the rectangle is 124. 2: The diagonal length of the rectangle is 50.
190321	(k-1)x=5.Is x>1.25?' 1:k is a positive integer. 2:k>5
190321 还原机经选题	n>2. Is n a prime number? 1:(n-1)!+1 can be divided by n. 2:(n+1)!+2 cannot be divided by n.
190321	x=(x+y+z+w)/4 -1, y = (x+y+z+w)/3 - 3 , z=(x+y+z+w)/4 , w=16.x=?
190321	xy>0,x/y +y/x >2? 1.$$x \neq y$$ 2.x=1.1y
190321	Under what conditions is \frac{3x}{\sqrt{-2x^2+6}} not a real number?
190321 还原机经选题: 文字题&几何	There is a three-digit positive integer, where two digits are the same, and the third digit is different from both. There are no zeros in those three digits. How many numbers satisfy the above requirements?