Question

What is different number between these four 25 ,81,126,529?

Answer 1

126 is the different number because all other numbers are perfect squares........
25 =
${5}^{2}$
81 =
${9}^{2}$
529 =
${23}^{2}$
but 126 is not a perfect square.......

Hope this helps you
mark my answer as brainliest