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Posted by on Monday, April 29, 2013 at 11:35am.

How many 4 digit positive integers have the ones digit a multiple of 1, the tens digit a multiple of 2, the hundreds digit a multiple of 3 and the thousands digit a multiple of 4?

  • Math (Combinatorics) - , Monday, April 29, 2013 at 2:01pm

    (2)(4)(5)(10)=400

  • Math (Combinatorics) - , Friday, May 3, 2013 at 4:25am

    400

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