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## 5-digit Numbers

Math brain teasers require computations to solve.

 Puzzle ID: #11908 Fun: (2.63) Difficulty: (2.67) Category: Math Submitted By: Mhalun

How many 5-digit numbers are there that do not contain the numbers 3 and 5, and are multiples of 4?
(It cannot start with 0, ie. 01234 is not a 5 digit number)

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 bumbles2003 Apr 24, 2003 yeah pretty good work Mhalun Apr 24, 2003 Thnks! Please give me more suggestions!!!! jimbo Apr 25, 2003 Nicely explained. I rushed in and got 7*8*8*20 by halving the number of numbers dividible by 2. I had a suspicion that it was wrong so you've set me straight. jimrcook Apr 28, 2003 In fact, if you prohibit any two odd digits (instead of 3 and 5), you still get 9408. But, which two digits would you prohibit to have the least number of solutions -- 4032? Thanks for the fun puzzle. smart432890 Apr 29, 2003 hi EverquestBoy May 21, 2003 Dude nice one i couldnt figure that out if my life depende on it but it was sorda fun to also see a difrent teaser for once. jacintan Jun 13, 2003 I don't quite realise how to work that out yet. Not the kind of thing you learn in year four

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