Question

1. What could be the possible 'one's' digits of the square root of each of the following numbers ?
(i) 9801
(i) 99856
(l) 998001
(v) 657666025
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Answer 1

The possible digit at one's place of the square root of: (i) 9801 can be 1 or 9. (ii) 99856 can be 4 or 6. (iv) 657666025 can be 5.

Answer 2

Answer:

⚘Solution:

The possible 'one's' digits of the square of:-

$\sf{(i) \: 9801}$

$\sf{ = 1 \times 1 = 1 \: and \: 9 \times 9 = 81}$

$\sf{(ii) \: 99856}$

$\sf{ = 4 \times 4 = 16 \: and \: 6 \times 6 = 36}$

$\sf{(iii) \: 99001}$

$\sf{ = 1 \times 1 = 1 \: and \: 9 \times 9 = 81}$

$\sf{(iv) \: 657666025}$

$\sf{ = 5 \times 5 = 25}$