Question

1.
What will be the unit digit in the square of following numbers?
(a) 16 (b) 253 (c) 52698
(d) 9284 (e) 431 (f) 78949
(g) 66866
(h) 4876937
0​

Answer 1

Answer:

always the square root of unit place is 0,1,4,5,6,9

Step-by-step explanation:

a)16×16=256 unit digit is 6.

b)253×253=64009 unit digit is 9.

c)52698×52698=2777079204 unit digit is 4.

d)9284×9284=86192656 unit digit is 6.

e)431×431=185771 unit digit is 1.

f)78949×78949=6232944601 unit digit is 1.

g)66866×66866=4471061956 unit digit is 6.

h)4876937×4876937=23784514501969 unit digit is 9.

Answer 2

Step by Step all the questions are:

1. (a) 16 × 16 = 256 unit of digit is 6
2. (b) 253 × 253 = 64009 unit of digit is 9
3. (c) 52698 × 52698 = 2777079204 unit digit is 4
4. (d) 431 × 431 = 185761 unit digit is 1
5. (e) 78949 × 78949 = 6232944601 unit digit is 1
6. (f) 66866 × 66866 = 4471061956 unit digit is 6
7. (g) 4876937 ×4876937 = 23784514501969 uni of digit is 9

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