Question 109

The unit digit in the product $$122^{173}$$ is

Solution

As we know a number with unit digit 2 have repeating cycle of 2,4,8,6 after every fourth power
as power is 173 or (172+1) where till 172 , 43rd cycle will get complete and next unit digit will be 2.

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SSC CGL 2011 Question Paper Tier 1 - Shift 1 (June 19th)

The unit digit in the product $$122^{173}$$ is

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