Question

Identify the number whose square would end with 9
Pls I need the step
A)123.
B)77
C)82
D)109

Answer 1

Let us test ...{the last digit}

●(123)^2= ...3×...3= ..9

●(77)^2= ....7×..7= ..9

●(82)^2= ...2×..2= ...4

●(109)^2= ...9×...9= ...1

^

Clearly , we have seen that the squares of A) 123 and B) 77 , end up with the digit 9

Answer 2

Answer:

Let us test ...{the last digit}

●(123)^2= ...3×...3= ..9

●(77)^2= ....7×..7= ..9

●(82)^2= ...2×..2= ...4

●(109)^2= ...9×...9= ...1

^

Clearly , we have seen that the squares of A) 123 and B) 77 , end up with the digit 9. pls mark me as brainliest

Step-by-step explanation: