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Decimal Place Value

Findthe last ...

Question

Find the last two digits of 17²⁵⁶.

A

61

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B

81

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C

51

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D

71

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Solution

The correct option is B 81
Since 17²⁵⁶ = (17²)¹²⁸ = (289)¹²⁸= (290 - 1)¹²⁸

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