3, -6, 12, 4, 20, ?

Question

WHAT IS THE NEXT NUMBER IN THE PATTERN

Answer 1

Hi Christine!

What a super cool problem!!!  

Thank you for sharing!!!  :)

 

Here's your answer, but before you look

at it, I think you should keep trying to get 

it on your own. 

Answer:

3.......-6.........12.......4..........20

  -9        +18       -8     +16

 

3 - 9 = -6

-6 + 18 = 12

12 - 8 = 4

4 + 16 = 20

20 - 7 = 13

13 + 14 =27

 

In other words, you have two patterns

that are generated. 

-9, -8, -7, -6 and so on

18, 16, 14, 12 (because 9 x 2 = 18

and 8 x 2 = 16 and 7 x 2 = 14

 

Your answer:  The next number is 13 :)