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Q.

If  

72 = 49

672 = 4489

6672 = 444889

66672 = 44448889

then 66666672 = ________.

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a

444444488888889

b

4444448888889

c

444444888889

d

44444448888889

answer is D.

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Detailed Solution

We have,

72 = 49

672 = 4489

6672 = 444889

66672 = 44448889

666672 = 4444488889

6666672 = 444444888889

then 66666672 = 44444448888889. 

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