martinawy

在一个 xyz 三维的空间里 坐标点都取整数 -13

uclb5550

能告诉我原题出自那篇机警吗？

uclb5550

114. C. From 1, you know the percentage of owned 2 bedrooms on total rooms 1/3*2/5=2/15   From 2, you know the persentage of 2 bedrooms on the total rooms 3/5, then 3/5-2/5=7/15 the percentage of rented 2 bedroom.

66, i am also puzzled on the answer choices.

41.  Draw a number line, the set the number 6,7,8,2 on it, then see what it would be to put the possible number on right or left sides of these number while satisfying the requirement, you will there are some possible ways that both fit the conditions and fail to answer the question.

29. I forget where this question is from. IF you can show me, i would like to figure it out.

4. First reckon out how much increased. (60-50)*1.5+125*0.08*1.5=30
   Then the original cost 50*1.5+125*1.5=262.5
   The persent of increase is 30/262.5=4/35

fredericji

.▲PQR，PR=4，PQ=8，这两边的夹角为60度，
同意smart的解法， 题干可能有问题。

fredericji

同意smart的看法。

fredericji

66 S＝1－1/2+1/3-1/4........+1/59-1/60 =1-(1/2-1/3)-(1/4-1/5)-......-(1/58-1/59)-1/60 <1