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模考带练机经题
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The probability of getting head once and the probability of getting tail once are not the same when a coin is tossed once. If there are no other results of tossing a coin, what's the probability of getting both heads when the coin is tossed twice?
(1) the probability of getting head once is twice the probability of getting tail once.
(2) the probability of two tosses with one head and one tail is 4/9
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模考带练机经题
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X works alone for 2 hours to produce 6 machines, and Y works alone for 2 hours to produce 8 machines. In a task, at least one person is working, 44 machines are produced in 7 hours (that is, two people work together for a period of time, one person works alone for a period of time). If x and y cooperate to produce 44 machines with the shortest working time, how many hours do they work simultaneously?
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模考带练机经题
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If 12! is a multiple of $$(4!)^{n}$$ and not a multiple of $$(4!)^{n+1}$$, what is the value of n?
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模考带练机经题
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If x is a positive integer, what is the remainder when $$x^{2}$$ is divided by 8?
(1)The remainder is 1 when x is divided by 2
(2)The remainder is 2 when x is divided by 3
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模考带练机经题
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Is $$\frac{m}{n}$$ < $$\frac{n}{m}$$?
(1)mn > 0
(2)m < n
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