Question

a number becomes a perfect square when it is subtracted by 1 .which of the following cannot be the unit place of that number

Answer 1

Answer:

where are the option bro

Step-by-step explanation:

Answer 2

Squares: There is a definite relationship between the unit digits when square of a number is considered,

we will see that one by one.

– If unit digit of a perfect square is 1 then ten’s digit has to be Even

E.g. 81, 121, 441, 961 all are Perfect Square having unit digit 1 and tens digit is even.

– If unit digit of a number is 2 then it can’t be a perfect square.

– If unit digit of a number is 3 then it can’t be a perfect square.