[計量] 求解幾題數學
今天開始算計量
發現太久沒碰數學，看題目實在很花時間
以下題目解不出答案
麻煩大家幫幫忙嚕!!
i 12345678
n 12232424
1.in the table above, the number in the row labeled i form the sequence
of positive integers and each number in the row labeled n is the number of
different positive divisors of the corresponding integer i. what is the value
of n that corresponds to the integer 36? 這題實在找不出規律><
A)4 B)6 C)7 D)8 E)9
2.if the organization were to sell n ticket for a theater production, the
total revenue from ticket sales would be 20% greater than the total costs of
production. if the organization actually sold all but 5% of the n tickets, the
total revenue from tickets sales was what percent greater than the total costs
of the production?
A)4% B)10% C)14% D)15% E)18%
3.one-fifth of the light switches produced by a certain factory are defective.
Four-fifth of the defective switches are rejected and 1/20 of the
non-defective switches are rejected by mistakes. if all the switches not
rejected are sold, what percent of the switches sold by the factory are
defective?
A)4% B)5% C)6.25% D)11% E)16%
4. Which of the following CANNOT be the sum of 3 or more consective integers?
A)1 B)2 C)3 D)4 E)5
5.What is the probability of selection and odd number at random from the set
of {1,2,...n},in which n is an odd number and greater than 50?
Ans:
1/2+1/2n
以上，2.3.4.5基本上題目看不太懂
跟同學討論也無解!
多謝大家耐心指教啦!!^^
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