[計量] 好多題計量請教
1. Two successive discounts of 30% and 30% are equivalent to a single discount
of p percent.
Column A Column B
p 49 ANS:A 題目看無
2. Column A Column B
The area of rhombus 70
ABCD if 線段AB = 10
and 角BAC = 45度 ANS:A
3 Column A Column B
The slope of a line
that passes through 2/3
the origin and makes
a 30 degree angle with
the x-axis. ANS:B
4. Column A Column B
The area of an isosceles
right triangle whose 4
perimeter is 10. ANS:A
5. X≠0 , √(2x)=(3x)^1/3
Column A Column B
x 1.2 ANS:B
6. How many positive 3-digit integers contain the digit 9?
(A) 180
(B) 244
(C) 252
(D) 280
(E) 648 ANS:(C) 算好幾遍，湊不出答案...
7. Column A Column B
The maxiumn number of 6
non-overlapping regions
into which 3 lines can
divide the interior of
a circle. ANS:A
8. Circle O is inscribed in a 3-4-5 triangle.
Column A Column B
The probability of the 1/2
point that is not inside
the circle O if a point
is chosen at random from
inside the triangle. ANS:B
9. In hoe many ways can Alice, Betty, Carol, Diana, and Emma sit at a round
table if either Betty or Carol must sit in a certain seat and neither
Diana nor Emma can sit another certain seat?
(A) 8
(B) 12
(C) 18
(D) 24
(E) 36 ANS:(D)
10. A bowl contains red, green ans white balls. The probability of choosing a
red ball is 1/3. There are 5 more green ball than red ones, and there are
12 White balls. What is the odds against chooseing a white ball?
(A) 12/39
(B) 12/51
(C) 13/4
(D) 17/4
(E) 12/22 ANS:(C) 各有幾顆球都算出來了，不過看不懂最後一句話
摸魚了兩天，這是今天的題目，一樣要麻煩大家了！
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