If a, b, c are Pythagorean triplets then which of the following is true ?

Which of the following is pythagorean triplet ?

Which of the following number is doesn’t lie in the units place of a square number ?

Which of the following is not a perfect square number ?

$\sqrt{625}+\sqrt{441}\backslash sqrt\{625\}+\backslash sqrt\{441\}$ =

The units digit of $(123456{)}^2(123456)^2$

${111}^{2}111^2$ = ……

1 + 3 + 5 + 7 + 9 =

$\sqrt{10201}\backslash sqrt\{10201\}$ =

No. of integers lie between $4^{2}4^2$ and $5^{2}5^2$