[計量] 請問CAT 11的問題
1. If a 4-digit number is chosen at random, what is the probability that
it will be a palindrome? (palindrome的意思是例如:33,414,2882)
Ans : 1/100
2. Two successive discounts of 30 percent and 30 percent are equivalent to
a single discount of p percent.
Col A : p Col B : 49
Ans : (A)
這題的p不就是70% * 70% = 49% => (C) 為什麼是(A)呢?
3. If the length and width of a rectangular solid are increased by 25% and
the height is decreased by 20%, by what percent does the volume of the
solid change?
Ans : 25% increased
這題不是 5/4 * 4/5 = 1 也就是跟原面積相同 ??
4. Col A : The slope of a line that passes through the origin and makes a
30度 angle with the x-axis.
Col B : 2/3
Ans : (B)
不知道要怎麼判斷 XD 感覺很簡單
不好意思 麻煩各位幫忙解答了
謝謝
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