Question

What will be the units digit of the square of the following numbers?
(i) 39
(ü) 297
(i) 5125
(iv) 7286
(v) 8742​

Answer 1

i. 1

ii. 9

iii. 5

iv. 6

v. 4

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Answer 2

i) 39 → 9×9=81

Unit digit →1

(ü) 297 →7×7=49

Unit digit→9

(i) 5125→5×5=25

Unit digit →5

(iv) 7286→6×6=36

Unit digit→6

(v) 8742→2×2=4

Unit digit→4

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