Asked by jd

4 digit number > 2000. the sum of its digits is 10. only the thousands place and the hundreds place are odd numbers. the number in the ones place double the digit in the hundreds place. what number will it be?
Answered by Steve
3xxx or 5xxx
Now we have possibilities of
3x1x: 3214
3x3x: nope
3x5x: nope
3x7x: 3070

numbers over 5000 don't work - digits add up too quickly
Answered by Steve
actually, I guess if 3070 is allowed, so is 7030

If all digits must be unique, then I guess 3214 is the only choice.
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