Question

In each of the following questions, select the related letters / words / numbers from the given alternatives.

9 : 80: : 100 : ?

A 901 Correct Answer Incorrect Answer
B 1009 Correct Answer Incorrect Answer
C 9889 Correct Answer Incorrect Answer
D 9999 Correct Answer Incorrect Answer

Solution

9² - 1 = 81 -1 = 80100² - 1 = 10000 – 1 = 9999

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