Troy H.

asked • 06/19/15

If 2=6, 3=12, 4=20, 5=30, 6=42, then 9=?

The solution to the following algorithm is?

1 Expert Answer

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Jerry A. answered • 06/19/15

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2 * (2+1) = 6
3 * (3+1) = 12
4 * (4+1) = 20
5 * (5+1) = 30
6 * (6+1) = 42
...
9 * (9+1) = 90
...
n * (n+1) = n2 + n
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Michael J.

I remember seeing this exact question on a LinkedIn post.  Anyone who has LinkedIn probably has too.  :)
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06/19/15

Troy H.

Dude that's wrong...you're assuming a trend in this question...
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06/20/15

Jerry A.

Ok. How did you get 72?
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06/21/15

Troy H.

you can't assume 10 follows in the "If" statement...it ENDS with "then" ,you assumed that 9(10) follows... 
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06/21/15

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