People are torn on if the answer is 12 or 18. Others keep saying "not enough information". Most of the people, including in this article, keep making it a series problem.
When in reality this simple equation
x(x+1)
solves it and fits the "missing" 10, 5, and 4.
12 or 18
Posted: Thu Oct 20, 2022 3:55 pm
by TheCatt
The 18 people are failing, as there is no number before 9, so we must assume that each problem is self-contained and based only on X. 12
12 or 18
Posted: Thu Oct 20, 2022 4:09 pm
by Cakedaddy
I immediately came up with 12 and I don't even see how they get 18.
12 or 18
Posted: Thu Oct 20, 2022 4:18 pm
by GORDON
Usually it's PEMDAS that confuses people.
12 or 18
Posted: Thu Oct 20, 2022 4:28 pm
by thibodeaux
None of those "equalities" are true, so an idiot wrote this problem anyway.
The correct way to write the problem is:
find f(x) such that
f(9) = 90
f(8) = 72
...
what is f(3)?
Further there should be some constraint on f(x), like "f(x) is a polynomial" or something.
12 or 18
Posted: Thu Oct 20, 2022 4:30 pm
by TheCatt
thibodeaux wrote: ↑Thu Oct 20, 2022 4:28 pm
None of those "equalities" are true, so an idiot wrote this problem anyway.
The correct way to write the problem is:
I wonder why your posts never go viral.
12 or 18
Posted: Thu Oct 20, 2022 4:31 pm
by thibodeaux
I only post here, nobody else is smart enough to understand.