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6 , 12 , 20 , 30 , 42 , 56 , 72 , . . .
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6 , 12 , 20 , 30 , 42 , 56 , 72 , . . .

User Jurpro
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1 Answer

6 votes
The next number would be 90.

Explanation: 6+6=12
12+8=20
20+10=30
30+12=42
42+14=56
56+16=72

You keep adding two every time. So you would then do 72+18=90.

Hope this helps! :)
User Simon PA
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