Question

$(31{)}^3\times (31{)}^{-27}=?$

• A. $(961{)}^2$
• B. $4$
• C. $(31{)}^2$
• D. $29791$
• E. $Noneofthese$

Answer 1

The correct option is A $(961{)}^2$

$(31{)}^3\times (31{)}^{-27}$
By the rule of indices, we get
$(33{)}^{31-27}=(314{)}^4$
$\left(961{)}^2\right[\because {31}^2=961]$