AMC 8 2003 Problem 4
AMC8 2003 年第 4 题
方程与不等式★★☆☆☆
A group of children riding on bicycles and tricycles rode past Billy Bob's house. Billy Bob counted 7 children and 19 wheels. How many tricycles were there?
一群骑自行车和三轮车的孩子经过 Billy Bob 的家。Billy Bob 数了数,一共数到了 7 个孩子和 19 个轮子,那么有多少辆三轮车? Problem 5 If 20% of a number is 12, what is 30% of the same number? 如果一个数的 20%是 12,那么这个数的 30%是多少?
- A.}2 \qquad\mathrm{(B)}4 \qquad\mathrm{(C)}5 \qquad\mathrm{(D)}6 \qquad\mathrm{(E)}7$
正确答案 · Correct Answer
C
解析 · Solution
解析整理中
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