Erratic EquationsSeries teasers are where you try to complete the sequence of a series of letters, numbers or objects.
Fill in the 3 question marks.
1-3, 3/3, 2*2, 6+?, 13-?, 13*1, 3+?
HintWork out the answers to the filled in equations.
AnswerThey are (in order): 1, 3, 13.
The equations, when solved, make a second series: -2, 1, 4, 7, 10, 13, 16.
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