question_answer

Suppose that the division \[x\div 5\] leaves a remainder 4 and the division \[x\div 2\] leaves a remainder 1. Find the ones digit of x.

Answer:

Since, \[x\div 5\]leaves a remainder 4, so ones digit of x can be 4 or 9. Also, since \[x\div 2\] leaves-a remainder 1, so ones digit must be 9 only.