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trackboy · 22-25, M
it is 90 as its the sum of the previous two numbers. each number in the series is the sum of the two numbers before it. they have questions like that for screening at some jobs when your called in for interview. 😺
SpaceCreature · 26-30, F
Its already been answered. Try a better one.
1, -1, 4, 7, -7, 14...
1, -1, 4, 7, -7, 14...
GeniUs · 56-60, M
are we doing your school work?
HoraceGreenley · 56-60, M
The 90's were hip
@HoraceGreenley I preferred Weezer back then.
Monkey pooping!
eli1601 · 70-79, M
90
BearDownChicago · 41-45, M
90
MachiavellianSpirit · 26-30, F
90