I am greater than 4 tens and less than 5 tens I have 9 ones what number am I?

asked Nov 4, 2015 161k views

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$x\ \in(40;50)\ \ \ and\ \ \ x=10p+9,\ \ \ p\in I+\\\\x=49\\\\Ans.\ The\ number\ is\ 49$

James Jacques answered Nov 10, 2015

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