Question

write five numbers which you can divide by looking at their unit digits that they are not square number​

Answer 1

Given :  Number Which are not square

To find :  To Decide number is not square just by looking at unit digit

Solution:

Any number ending with 2 , 3 , 7  or 8 can not be  a Square number

Hence  Such numbers can be

123  

253

172

128

147

327

27

63

32

38

57

43

Ending digit of number & ending digit of Square

1² = 1

2² = 4

3² = 9

4² = 6

5² = 5

6² = 6

7² = 9

8² = 4

9² = 1

0² = 0

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