5 Answers
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+1,+3,+1,+3
next up should be 10,13,14,17,18,21
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+1+3+1+3
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1+1=2…2+3=5…5+1=6… 6+3=9…. 9+1=10… 10+3=13…. 13+1=14…. 14 +3=17.. etc. Its basically add 1, add 3, add 1.
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What Is This Pattern
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+1, +3 and repeat
+1,+3,+1,+3
next up should be 10,13,14,17,18,21
+1+3+1+3
1+1=2…2+3=5…5+1=6… 6+3=9…. 9+1=10… 10+3=13…. 13+1=14…. 14 +3=17.. etc. Its basically add 1, add 3, add 1.
What Is This Pattern
+1, +3 and repeat