Question

Observe the following pattern and fill in the missing number.
${11}^2=121$
${101}^2=10201$
${10101}^2=102030201$
${1010101}^2=......................$

• A. ${1010101}^2$$=10203030201$
  
• B. ${1010101}^2$$=10204040201$
  
• C. ${1010101}^2$$=1020304030201$
  
• D. ${1010101}^2$$=10204030201$
  

Answer 1

The correct option is C ${1010101}^2$$=1020304030201$

${11}^2$$=$$121$

${101}^2$$=$$10201$

${10101}^2$$=$$10203020101$

${1010101}^2$$=$$1020304030201$

${101010101}^2$$=$$10203040504030201$

Hence, option C is correct.