Question of the Day
Can you answer today's question?
Register
Next Tests:
6/1
Feb
18
2013
326,427
responses
| Number Answered | |
|---|---|
| Correct | 130,309 |
| Incorrect | 196,118 |
39%
correct
Mathematics > Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
If 
is the set of positive integers that are multiples of 
, and if 
is the set of positive integers that are multiples of 
, how many integers are in the intersection of 
and 
?
Hint
The intersection of sets 
and 
is the set of positive integers that are multiples of both 
and 
.
and 
is the set of integers that are in 
and also in 
. Set 
consists of all positive integers that are multiples of 
, and set 
consists of all positive integers that are multiples of 
, so the intersection of 
and 
is the set of positive integers that are multiples of both 
and 
. This is the set of all positive integers that are multiples of 
, so there are more than thirteen integers in the intersection of 
and 
.