下面是是2012年3月4日的SAT官方每日一题的内容，是关于数学方面的，题型是选择。SAT官方每日一题是collegeboard每天都会发布的题目，关于SAT考试的三个部分的各个题型。下面我们就一起来看一下这个SAT官方每日一题吧。
SAT官方每日一题之数学---选择：
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Mathematics > Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
The function 
is graphed in the 
above. If the function 
is defined by 
, for how many values of 
between 
and 
does 
equal 
?
Answer Choices
(A) None
(B) One
(C) Two
(D) Three
(E) More than three
The correct answer is C
Explanation
The graph of the function 
is the same as the graph of the function 
translated up 
units. The function 
intersects the 
three times, but if the graph is shifted up 
units, then the graph will intersect the 
only twice. Therefore, 
is equal to 
for exactly two values of 
between 
and 
.
下面是一道和SAT官方每日一题相似的题目，供大家练习：
For how many positive two-digit integers is the ones digit greater than twice the tens digit?
A. 
B. 
C. 
D. 
E. 
The correct answer is A
Explanation
The correct answer is (A). If the tens digit is 
, there are 
positive two-digit integers with the ones digit greater than twice the tens digit: 
and 
. If the tens digit is 
, there are 
positive two-digit integers with the ones digit greater than twice the tens digit: 
and 
. If the tens digit is 
, there are 
positive two-digit integers with the ones digit greater than twice the tens digit: 
and 
. If the tens digit is 
, there is 
positive two-digit integer with the ones digit greater than twice the tens digit: 
. If the tens digit is equal to or greater than 
, then the ones digi
