Find the Missing Number in the Box

Number-Grid-Riddle

Solution:

The second column is the double of first and the third is double of second.

So we can confirm this as follows..

3 x 2 = 6 and

6 x 2 = 12

so… 5 x 2= 10  and 10 x 2= 20..

ANSWER: 20

 

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