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The magic Number (Posted on 2004-03-17) Difficulty: 1 of 5
Whats the smallest number ("the magic number") that can satisfy these conditions?

- its positive

- it is not divisible by any number below 20 (excluding 1)

- the average of the digits is an even number between 3 and 9

See The Solution Submitted by Victor Zapana    
Rating: 3.3333 (9 votes)

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Solution srividhya's Solution to Victor | Comment 30 of 35 |

To Victor Zapana

The special number  is 53

the numbers not divisible by any number <20 should be prime and greater than 20

The numbers are 23,29,31,37,41,43,47,53,59,61 and so on.

The least number with avg of digits as a +ve integer between 3 and 9 (4,6,8) is 53

sum=8, avg=4

  Posted by srividhya on 2004-04-04 23:45:59
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