Q10 The sides of a square region, measured to the nearest centimeter, are 6 centimeters long. The least possible value of the actual area of the square region is A.36.00 sq cm B.35.00 sq cm C.33.75 sq cm D.30.25 sq cm E.25.00 sq cm
Answer: C 我选E,因为当面积为25, 说明边长为5,这个数字最不可能进位成为6。 请问我的思路错在哪里?
Q13 If the average (arithmetic mean) of the assessed values of x houses is $212,000 and the average of the assessed values of y other houses is $194,000, what is the average of the assessed values of the x+y houses? (1) x+y=36 (2) x=2y Answer: C 我选B,我觉得可以单独凭条件2推出答案。这道题我错在哪里?
谢谢大家了。
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