Math
posted by Anne .
i am a 4 digit number between 3000 and 4000.My ones digit is twice my thousands digit.My hundreds digit is the same as my ones digit and my tens digit is one less than the hundreds digit.If the sum of my digit is twenty,what number am i?

Math 
Reiny
Just follow the description and fill it in
"i am a 4 digit number between 3000 and 4000."
So the number must be
3xxx
"My ones digit is twice my thousands digit."
so it must be
3xx6
"My hundreds digit is the same as my ones digit"
so it must be
36x6
"my tens digit is one less than the hundreds digit"
so it must be
3656
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