Question

A number becomes a perfect square when we subtract 1 from it. Which of the given options CANNOT be the last digit of that number?
a) 2
b)4
c) 5
d) 0​

Answer 1

Answer:

The last digit cannot be 4 because when we subtract 1 from it ...it becomes 3 and 3 cannot be a last digit of any perfect square...You can check here

Last digit Last digit

of no. of square

0 0

1 1

2 4

3 9

4 6

5 5

6 6

7 9

8 4

9 1

Answer 2

Answer:

2

Step-by-step explanation:

Hope it helps and is the correct answer