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A series of diagrams of shaded and unshaded small triangles is shown below.
(a) Find the number of unshaded triangles in Diagram 6.
(b) What is the number of shaded triangles in Diagram 27?
(c) Write down the diagram which has 135 unshaded triangles.
(d) Find the number of shaded triangles in Diagram 50
(e) Find the total number of triangles in Diagram 80
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