Question

If x and y are the number of possibilities that A can assume such that the unit digit of A and Acube are same and the unit digit of Asquare and Acube are same respectively, then the value of x – y is (where A is a single digit number)

Answer 1

Thank you for asking this question. Here is your answer:

These are the possibilities  

For a single digit number A  

it's cube  is equal to it's number itself  

if A ={1,-1,0}

it's square is equal to it's number itself

if A={1,0}

x-y=3-2=1

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