Answer:
If remainder = 4, then the one?s digit of ?N? must be either 4 or 9. For \[N\div 5,\] remainder = 4 One?s digit can be 4 or 9. ...(i) Again, for N ÷ 2, remainder = 1 N must be an odd number. So, one?s digit of N must be 1, 3, 5, 7 or 9. ...(ii) From (i) and (ii), the one?s digit of N must be 9.
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