Inactive Tutor answered • 01/07/20
Tutor
New to Wyzant
There are two sequences
4 - 12 = -8
-8 - 12 = -20
-20 - 12 = -32
1, __, 29, 43
43 - 29 = 1
1 + 14 = 15
15 + 14 = 29
The missing number is 15.
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