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Question

The last digit of the number 32015 is

A 1 Correct Incorrect

B 3 Correct Incorrect

C 5 Correct Incorrect

D 7 Correct Incorrect

Detailed Solution

3 follows the rule of cyclicity Unit digit of 3¹ = 3 Unit digit of 3² = 9 Unit digit of 3³ = 7 Unit digit of 3⁴ = 1 Now, When 2015 is divided by 4 Remainder = 3 ∴ Units digit of 3²⁰¹⁵ = 3³ = 7 (last digit)

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