# What is the missing number?

## { (6, 12, 6), (28, 38, ?), (8, 7, 5) :}

Apr 6, 2017

$22$

#### Explanation:

The middle sequence seems to be twice the sum of the first and third sequences:

$2 \left(6 + 8\right) = 28$

$2 \left(12 + 7\right) = 38$

$\textcolor{b l u e}{2 \left(6 + 5\right) = 22}$