What could be the possible‘ one’s ’digits of the square root of each of the following numbers?

(i) If the number ends with 1, then the one's digit of the square root of that number may be 1 or 9. Hence,one's digit of the square root of 98 01 is either 1 or 9

(ii) If the numberends with 6, then the one's digit of the square root of that number may be 4 or 6. Hence, one's digit of the square root of 99 856 is either 4 or 6

(iii) If the number ends with 1, then the one's digit of the square root of that number may be 1 or 9.Hence, one's digit of the square root of 99 80 01 is either 1 or 9

(iv) If the number ends with 5,then the one's digit of thes quare root of that number will be 5. Hence, the one's digit of the square root of 657666025 is 5