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Question

In the given figure, each small square represents 20.
Which of the following combinations of colours represent 23?

A
Yellow, blue and red
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B
Yellow, dark green, blue and purple
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C
Blue, purple, red and light green
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D
Purple and light green
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Solution

The correct options are
B Yellow, dark green, blue and purple
C Blue, purple, red and light green
Yellow, blue and red squares together represent 6, which is not a power of 2.

Yellow, dark green, blue and purple squares together represent 8, which can be written as 23.

Blue, purple, red and light green squares also represent the power 23.

Purple and light green squares represent the power 22.

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