Question

Find the square of $tttt$ in the scale of eleven.

Answer 1

$tttt$ in the scale of decimal from eleven is $10\times {11}^0+10\times {11}^1+10\times {11}^2+10\times {11}^3=14640$

${14640}^2=(214329600{)}_{10}=(ttt90001{)}_{1}1$