Question

What is the unit digit of
${39}^{53}\times {27}^{23}\times {36}^{12}$

• A. 2
• B. 4
• C. 6
• D. 8

Answer 1

The correct option is A 2

Unit digit of

${39}^{53}\times {27}^{23}\times {36}^{12}$

$Unitdigitof(9^{53}\times 7^{23}\times 6^{12})$

$=(9^{4K+1}\times 7^{4K+3}\times 6^{4K})$

$\Rightarrow (9\times 3\times 6)=2=unitsdigit$