Question

(iv) 3853
EXERCISE 6.1
1. What will be the unit digit of the squares of the following numbers?
(1) 81
(ii) 272
(ii) 799
(V) 1234
(vi) 26387
(vii) 52698 (viii) 99880
(ix) 12796
(x) 55555
The following numbers are obviously not perfect squares Give reason.​

Answer 1

Answer:

(i) 81 (ii) 272 (iii) 799 (iv) 3853 (v) 1234 (vi) 26387 (vii) 52698 (viii) 99880 (ix) 12796 (x) 55555. ∴ The unit's digit of (81 )2 will be 1. ∴ The unit's digits of (272)2 will be 4. ... ∴ The unit's digit of (26387)2 will be 9.

Answer 2

ANSWER

(i) 81

1

2

=1

So, unit digit will be 1

(ii) 272

2

2

=4

So, unit digit will be 4

(iii) 799

9

2

=81

So, unit digit will be 1

(iv) 3853

3

2

=9

So, unit digit will be 9

(v) 1234

4

2

=16

So, unit digit will be 6

(vi) 26387

7

2

=49

So, unit digit will be 9

(vii) 52698

8

2

=64

So, unit digit will be 4

(viii) 99880

0

2

=0

So, unit digit will be 0

(ix) 12796

6

2

=36

So, unit digit will be 6

(x) 55555

5

2

=25

So, unit digit will be 5