What is the number in the unit place in 729 59 ........

Quantitative Aptitude ( CCS) Number System

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What is the number in the unit place in (729)⁵⁹?

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Explanation:

When 729 is multiplied twice, the number in the unit place is 1.
In other words, if 729 is multiplied an even number of times, the number in the unit place will be 1.
Thus, the number in the unit place in (729)⁵⁸ is 1.
So, (729)⁵⁹ = (728)⁵⁸ X (729) = (…….1) X(729) = 9 in the unit place.