Write all possible 3-digit numbers using the digits 6,0,4 when

(i) repetition of digits is not allowed
(ii) repetition of digits is allowed

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Solution

(i) 604, 640, 460, 406
(ii) 666, 664, 646, 660, 606, 600, 644, 640, 604, 444, 466, 440, 446,464, 400, 404, 406, 460

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