Which of the following numbers are perfect squares of odd natural numbers?

$361,1296,49,121,289,1024,625,784$

Which of the following numbers are the perfect squares of even natural numbers?

$961,256,441,225,484,169$

Which of the following squares would end with digit $1$?

${109}^2, {121}^2, {77}^2, {82}^2, {49}^2, {81}^2$

Which of the following squares would have digit $6$ at the unit place?

${24}^2, {26}^2, {34}^2, {19}^2, {32}^2, {36}^2$

What will be the unit place digit in the square of the following numbers.

$9106, 324, 561, 329, 243$

What will be the number of zeros in the square of $50$?

What will be the number of zeros in the square of $3400$?

What will be the number of zeros in the square of $125000$?

What will be the number of zeros in the square of $1020$?