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3, -6, 12, 4, 20, ? what is the number after? 

 Apr 19, 2021
 #1
avatar+108 
0

Sorry I'm not good at this!

 

I wish I could help!

 

By the way, Become a member!!

 

~Hannah🌹🌹🌹

 Apr 19, 2021
 #2
avatar+144 
+1

3,   -6,   12,   4,   20

  -9   +18   -8   +16

you can see the pattern from here.

so, 20 - 7 = 13

 Apr 19, 2021

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