[計量] 又是數學
又要麻煩大家了!!
1. vending machine dispenses gumballs in the regular repeating cycle of ten
different colors. If a quarter is put into the machine, three gumballs can be
obtained from it. What is the minimum amount of money needed so as to get
three gumballs of the same color?
Ans:$1.75
看到這題覺得這題好像類似之前詢問過的選襪子問題
應該是解出要多少次數再乘上0.25就可以，但就是解不出來><
2. If there are 3 hooks and 5 pictures, what is the total number of
combinations of selecting 3 pictures?
Ans:10
基本上我根本不知道這題要問啥><
3.Which of the following has the greatest result?
(A)10^100+2^200
(B)100^10+2^10
(C)(100+2)^10
(D)100^100+2^100
(E)(10+2)^100
Ans:E
但我總覺得答案是D，到底怎樣才能快速解這種題型呢?
以上
感激不敬!!!!!!!!!!!!!!!!!!!!!!!!!
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