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What is the unit digit in 7105?
1
5
7
9
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Correct Answer:
7
Explanation:
Unit digit in 7
105
= Unit digit in [ (7
4
)
26
x 7 ]
But, unit digit in (7
4
)
26
= 1
∴ Unit digit in 7
105
= (1 x 7) = 7
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