Need help with MATH problem....please thanks in advance!

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Mar 8, 2005
My niece is in middle school and received this math problem that I am having a hard time helping her out with and she needs to go to sleep soon so I turned to NT. Here goes the problem....

"Find a formula that gives you the total number of toothpicks for figure N"

Figure Number                     Total Number of Toothpicks
1                                                 4
2                                                10
3                                                18
4                                                28
5                                                40
6                                                54
N                                               ???

I really appreciate whomever can help with this.....
 
My niece is in middle school and received this math problem that I am having a hard time helping her out with and she needs to go to sleep soon so I turned to NT. Here goes the problem....

"Find a formula that gives you the total number of toothpicks for figure N"

Figure Number                     Total Number of Toothpicks
1                                                 4
2                                                10
3                                                18
4                                                28
5                                                40
6                                                54
N                                               ???

I really appreciate whomever can help with this.....
 
n X 10 = 70

of course she needs to know how...

1       x 4           = 4
2       x 5              10
3       x 6              18
4       x 7              28
5       x 8              40
6       x 9              54
N      x10             ???
 
n X 10 = 70

of course she needs to know how...

1       x 4           = 4
2       x 5              10
3       x 6              18
4       x 7              28
5       x 8              40
6       x 9              54
N      x10             ???
 
  
deal_with_it_long.gif
 
^^^^I noticed the pattern but so what is the formula????????????????????

you have to use n such as (n*2+4) something like that
 
^^^^I noticed the pattern but so what is the formula????????????????????

you have to use n such as (n*2+4) something like that
 
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