|
||||||||||||||||
|
||||||||||||||||
|
|
|
|
Puzzle 39. PRIME NUMBERS |
||
|
Prime numbers are numbers whose only divisors are one and itself. For example, 31 is a prime number because its only divisors are 1 and 31. However, 12 is not a prime number because it can be divided by 1, 2, 3, 4, 6, or 12. There are more than 360,000 different 9-digit numbers that can be formed by rearranging the digits in the following number:
How many of these numbers formed are prime numbers?
|
||
|
Bits and Beyond... PRIME NUMBERS Prime numbers have captured the hearts of many mathematicians for centuries. During 18th century, mathematician Christian Goldbach (1690-1764) wrote to Leonhard Euler that he believed it could be shown that every even integer greater than 2 is the sum of 2 primes. For example, 30 = 23+7 and 36 = 13+23. Until now, this conjecture has neither been proved or disproved.
© 2000-2008 Logicville
|