Dojo
Admin
Number of posts : 154
Location : Probably somewhere near a computer
Registration date : 2008-08-12
 | | Subject: Lesson 1, Problem 2 Fri Aug 15, 2008 6:38 pm | |
| 2) How many numbers are in the set:
3,6,9,12...42? | |
|
herefishyfishy1
Developer
Number of posts : 36
Age : 29
Location : An insignificant little blue-green planet 93 million miles from the sun Sol.
Registration date : 2008-08-16
| | Subject: Re: Lesson 1, Problem 2 Sat Aug 16, 2008 7:59 am | |
| 42-3=39.
39/3=13
13+1=14.
14 is the answer. | |
|
Dojo
Admin
Number of posts : 154
Location : Probably somewhere near a computer
Registration date : 2008-08-12
| | Subject: Re: Lesson 1, Problem 2 Sat Aug 16, 2008 12:58 pm | |
| Thats one way, but is there a slicker way?
See lesson 1 and the answer key. | |
|
AIME15
Hardcore TMF user
Number of posts : 163
Age : 27
Location : Pleasanton, CA
Registration date : 2008-08-13
| | Subject: Re: Lesson 1, Problem 2 Sat Aug 16, 2008 1:38 pm | |
| Divide the whole thing by 3, to get 1-14. So there's 14 numbers. | |
|
Sponsored content
| | Subject: Re: Lesson 1, Problem 2 | |
| |
|
