下面为大家整理的是sat数学试题练习的内容，后面都附有详细的答案解析。SAT数学考试是非常注重对考生实际运用知识点能力的考察的，所以大家在备考的时候，一定要多加练习才行。下面我们来看看sat数学试题练习的详细内容吧。
1.A machine can insert letters in envelopes at the rate of 
per minute. Another machine can stamp the envelopes at the rate of 
per second. How many such stamping machines are needed to keep up with 18 inserting machines of this kind?
Answer Choices
(A) 12
(B) 16
(C) 20
(D) 22
(E) 24
sat数学试题答案
The correct answer is A
Explanation
First you can change 1 minute to 60 seconds so that the ratios are both in envelopes per second. One inserting machine inserts letters at the rate of 120 per 60 seconds, or 2 per second. So 18 machines would insert 36 letters per second.
Let 
be the number of stamping machines needed to keep up with 
inserting machines. Then, since one machine stamps 
envelopes per second, 
machines stamp 
envelopes per second. You can write the equation 
, which gives 
.
以上就是sat数学试题练习及答案的详细内容，包括了一些常见的知识点。大家可以在备考的时候，对此加以适当的练习和应用，测试自己在数学方面知识点的掌握情况。
