Question

The 10th place digit of a perfect square no. Is 7 then how many possible value for unit digit? ​

Answer 1

Answer:

1 to 9 all the possible values

Answer 2

Given:

The 10 th place of a perfect square number is 7

To find:

We have to find the number of possible values in unit's digit so that it is a perfect square

Solution:

We get 0 possible values for unit's digit because no perfect square with 7 in ten's place and a digit in unit's place

1²=1

2²=4

3²=9

4²=16

5²=25

6²=36

7²=49

8²=64

9²=81

10²=100

So no perfect square with 7 in ten's place