Question

$\mathrm{If}11\times 11=121,\mathrm{then}11\times 0.11=\mathrm{\_\_}$

• A. $1.21$
• B. $12.1$

Answer 1

The correct option is A

$1.21$

$$\begin{gathered} 11\times 0.11 \\ =11\times \frac{11}{100} \\ =\frac{11\times 11}{100}(\mathrm{Given}11\times 11=121) \\ =\frac{121}{100} \\ =1.21 \end{gathered}$$

Hence, $11\times 0.11=1.21$