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No: 17       November 21, 2018



A 2x2 digital display consists of 12 segments. You will create a shape by turning some of the segments on. Rules:

• At least one of the segments will be on.
• When multiple segments are on, those segments will form a connected shape.

How many different shapes can be created?

For example, for a square-shaped display with 4 segments, the answer would be 13.
1 shape with all segments on; 4 shapes for one, two or three turned on segments each.

Popularity: 56.3 %     Difficulty: 56.3 %    

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