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Q8: When positive integer x is divided by 5, the remainder is 3; and when x is divided by 7, the remainder is 4.When positive integer y is divided by 5, the remainder is 3; and when y is divided by 7, the remainder is 4.If x > y, which of the following must be a factor of x - y?
D.12 E.15 F.20 G.28 H.35 I.2
余数问题啊……纠结, Q23: One kilogram of a certain coffee blend consists of x kilogram of type I coffee and y kilogram of type II coffee.The cost of the blend is C dollars per kilogram, where C = 6.5x + 8.5y.Is x < 0.8? (1)y > 0.15 (2)C ≥ 7.30
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. D. EACH statement ALONE is sufficient. E. Statements (1) and (2) TOGETHER are NOT sufficient.
毫无头绪,答案是C Q28: A certain company sold 800 units of its product for $8 each and 1,000 units of its product for $5 each.If the company’s cost of producing each unit of its product was $6, what was the company’s profit or loss on the 1,800 units of its product?
A.$1,600 loss B.$600 loss C.No profit or loss D.$600 profit E.$1,600 profit
为何答案是A? Q36: If x, y, and k are positive numbers such that ( )(10) + ()(20) = k and if x < y, which of the following could be the value of k?
A.10 B.12 C.15 D.18 E.30 这个答案是D |
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