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Erratic Equations

Series teasers are where you try to complete the sequence of a series of letters, numbers or objects.

 

Puzzle ID:#39735
Fun:** (1.84)
Difficulty:** (1.98)
Category:Series
Submitted By:RampaginRoboAgb*****!

 

 

 



Fill in the 3 question marks.

1-3, 3/3, 2*2, 6+?, 13-?, 13*1, 3+?





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