Mystery number
posted by Yvette .
I have nine digits. The digit in the tens place is the value of any number times zero. The value of one of the digits is 40,000. The value of the hundredthousands place is ten times the digit in the tenthousand place. The digit in the millions place is the sum of the two digits to its right. The digit in the hundred place is half the digit in the ten thousands place. The digit in the thousands place is onetenth the value of the digit in the hundreds place. The digit in the hundred millions place is the difference between the digit in the hundreds place and the digit in the tens place. The digit in the ones place is the number of days in a week. The digit in the ten millions place is half of one dozen.

Mystery number 
Steve
Just work through the instructions. I'll get you started, but I'm sure you can read as well as I. Start with
xxx,xxx,xxx
The digit in the tens place is the value of any number times zero.
xxx,xxx,x0x
The value of the hundredthousands place is ten times the digit in the tenthousand place. Since each digit must be less than ten, that means you must have
xxx,00x,x0x
And so on. Analyze each sentence and what it means numerically. You might have to take some sentences out of order to nail down the digits. 
Mystery number 
Steve
Oh, wait. I misread the 2nd clue. It just means that both those digits are the same, since it said "value".
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