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Old 07-31-2007   #1
Dill
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Default Mathematics Question (Integer Patterns)?

How many four digit positive integers (x) are there with the property that x and 3x have only even digits?Like say for example, one number is x=8002 because 3x of this is 24006 and each the x and the 3x have only even digits.Nirja G did you put anything?
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