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Hi Denise, Since all 4 digits must be odd, then the number cannot be in the range of 2000 - 2999. So we know that the number must begin with a 3. Since 0 is not an odd number the so the digits cannot be 0. So we know than the number is truly between 3111 - 3159. The odd digits are 1, 3, 5, 7, 9, which ones have a difference of 6 that have not been used? Hope this helps, Janice | ||||||||||||
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