Question

${85}^2$ = ___________.

• A. 7225
• B. 6225
• C. 8225
• D. 6355

Answer 1

The correct option is A 7225

85 lies between 80 and 90. Hence its square should lie between ${80}^2$ and ${90}^2$.
${80}^2$ = 6400 and ${90}^2$ = 8100
Hence, 7225 lies between 6400 and 8100 and is the correct option.

${85}^2$ = $85\times 85$ = 7225