# Number Series: Series Pattern

I saw a board on a math website that said to solve this if you are genius:

8=56

7=42

6=30

5=20

3=?

I see there are several ways to approach this and I have come up with 9 (my best guess), 6, and 14. What answer is most correct and why? Please provide a detailed explanation.

© BrainMass Inc. brainmass.com October 10, 2019, 7:13 am ad1c9bdddfhttps://brainmass.com/math/logic/number-series-series-pattern-572479

#### Solution Preview

I believe most people will guess the following pattern:

line 1: 56 = 8*(8-1)

line 2: 42 = 7*(7-1)

line 3: 30 = 6*(6-1)

line 4: 20 = 5*(5-1)

Then they assume a fifth line: 4=12 (i.e., 12=(4*(4-1)) is omitted.

The last ...

#### Solution Summary

This solution solves for the pattern of a series of equations.

$2.19