[計量] GWD14-11 14-26
Mary persuaded n friends to donate 500 each to her election
compaign, and then each of these n friends persuaded n more people to donate
500 each to Mary's compaign. If no one donated more than once and if there
were no other donations, what was the value of n?
1 THe first n people donated 1/16 of the total amount donated.
2 The total amount donated was 120000
Ans D 我選C耶
If the units digit of the three-digit positive integer k is nonzero, what
is the tens digit of k?
1 The tens digit of k+9 is 3
2 The tens digit of k+4 is 2
Ans A 我覺得第二個也可以
麻煩好心可以幫我一下
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