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What is the unit digit in(795 - 358)?

Correct Answer: 4

Explanation:

Unit digit in 7 95 = Unit digit in [(7 4 ) 23 x 7 3 ]
= Unit digit in [(Unit digit in(2401)) 23 x (343)]
= Unit digit in (1 23 x 343)
= Unit digit in (343)
= 3

Unit digit in 358 = Unit digit in [(34)14 x 32]
= Unit digit in [Unit digit in (81)14 x 32]
= Unit digit in [(1)14 x 32]
= Unit digit in (1 x 9)
= Unit digit in (9)
= 9


Unit digit in (795 - 358) = Unit digit in (343 - 9) = Unit digit in (334) = 4.


So, Option B is the answer.


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