Question

Observe the following pattern and supply the missing numbers.
${11}^2=121$
${101}^2=10201$
${10101}^2=102030201$
${1010101}^2=1020304030201$
$............{.}^2=10203040504030201$

Answer 1

Given pattern is,

${11}^2=121$

${101}^2=10201$

${10101}^2=102030201$

${1010101}^2=1020304030201$

Following the above pattern, we will get:
${101010101}^2=10203040504030201$

Hence, the answer is $101010101$.