[計量] Rack A holds 80 pairs of ...
(1) Rack A holds 80 pairs of slacks with prices ranging from $12 to $15 a pair
, and rack B holds 60 pairs of slacks with prices ranging from $13 to $18
a pair. If all the slacks are sold, what is the greatest amount by which
the revenue from the sale of slacks on rack A could possibly exceed the
revenue from the sale of slacks on rack B?
(A)$430
(B)$412
(C)$122
(D)$120
(E)$112
Ans:B
(2)In a certain brick wall, each row of bricks above the bottom row contains
one less brick than the row just below it. If there are 5 rows in all and
a total of 75 bricks in the wall, how many bricks does the bottom row
contain?
(A)14
(B)15
(C)16
(D)17
(E)18
Ans D
關於這2題...我想了很久= =
也可能是因為太累而無法思索.....
但我就是想不出來@@
所以...
請版上的熱心人士為幫我解答疑惑吧>"<
感激不盡~~
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