# Math

posted by .

Number Series
I am having problems with these 2

3 2 6 4 9 6 12 8 (what should be next?)
3 6 9 12 9 6 3 6 (what should be next?)

• Math -

15
12

• Math -

I know the top one is 15 because is goes 3 then 2 down then add 3 to the previous number(3) so that's 6 then 2 down etc.

for the second one i don't think its 12 i think its 9 because it goes up from 3 to 12 then starts counting down then when it gets to 3 it counts up again so the next one after 6 would be 9 :)

## Similar Questions

1. ### math 2ND PART (B)

Part (b) 1.If next year the number of accounts increases by 20%, the number of technicians has to be increased by 20%, too. How many new technicians have to be hired next year?
2. ### 2nd grade math requestion post

Okay, my child is doing problem solving lesson 5-7 in scott foresman addison wesley book. The question that we are having a problem with is a number line. there are 10 spaces in the number line and the clues are: Clue 1: the number …
3. ### Algebra

Let a be the value of the function when n is 0. The number of the first row of differences is b, the first number of the next row is c, and so on. The formula for the nth number of the series is: a + bn + cn(n-1)/2! + dn(n-l)(n-2)/3! …
4. ### Algebra

Let a be the value of the function when n is 0. The number of the first row of differences is b, the first number of the next row is c, and so on. The formula for the nth number of the series is: a + bn + cn(n-1)/2! + dn(n-l)(n-2)/3! …
5. ### Algebra

Let a be the value of the function when n is 0. The number of the first row of differences is b, the first number of the next row is c, and so on. The formula for the nth number of the series is: a + bn + cn(n-1)/2! + dn(n-l)(n-2)/3! …
6. ### Math

What the next number should be? 6 18 20 10 30 32 16
7. ### Math Urgent

To form a certain sequence, the rules are: 1)If a number is even, divide by 2 to get the next number 2)If a number is odd, multiply by 3, then add 1 to the the next number. Starting with 12,the 1000th term would be... a.1 b.2 c.3 d.4 …