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The unit digit in the square of the number \(27\) is（ ）
A. \(7\)
B. \(2\)
C. \(5\)
D. \(9\)
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MathsClass 8

The unit digit in the square of the number \(27\) is（ ）
A. \(7\)
B. \(2\)
C. \(5\)
D. \(9\)

Answer

D
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Solution

Given number is \(27\)
Unit digit of the number \(27\) is \(7\).
Squaring it, we get,
\(= 7^2=7 \times 7 =49\)
\(\therefore\) unit digit of the square of the number \(27\) is \(9\).
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