Question

The last digit of 2 power 9 5 power 135

Answer 1

hey mate here is your answer
$(1) \: \: \: {2}^{9} = \\ 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \\ = 4 \times 4 \times 4 \times4 \times 2 \\ = 16 \times 16 \times 2 \\ = 6 \times 6 \times 2 \\ = 36 \times 2 \\ = 6 \times 2 \\ = 12 \\ unit \: digit \: = 2$
and

$(2) \: \: \: {5}^{135} \\ as \: we \: know \: that \: any \: number \: \\ if \: multiply \: by \: five \: the \: unit \: \\ digit \: is \: found \: to \: be \: 5 \\ \\ so \: {5}^{135} = \\ unit \: digit \: = 5$
hope this helps you
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