If all numbers are defined to be positive integers of the form 4n + 1 (i.e. 1,5,9,13,17, etc), find the first six primes. I think they're 5, 9, 13, 17, 21, and 29, but that seems wrong for some reason.

Question

If all numbers are defined to be positive integers of the form 4n + 1 (i.e. 1,5,9,13,17, etc), find the first six primes.  I think they're 5, 9, 13, 17, 21, and 29, but that seems wrong for some reason.

anonymous · Answer

Yeah, but it's excluded in this case.

swissgirl · Answer

9 aint a prime number

swissgirl · Answer

9=3*3
21=7*3

anonymous · Answer

There is no 3 in this set of integers. ;)

swissgirl · Answer

ohhhhhhh  i get ur question

anonymous · Answer

Seems obvious that those are the first six primes, but my intuition is warning me that something is awry.

swissgirl · Answer

@dan815  what do you think?

dan815 · Answer

yeah

dan815 · Answer

numbers of 4n+1
numbers
1,5,9,13,17,21,25
5 is a prime because onl 1 and 5 go into it
same wth 9 since 1 5 doent go into it
13 since 5 and 9 dont... and so on

anonymous · Answer

Thanks

anonymous · Answer

They need an openstudy area for programming. :)

swissgirl · Answer

There is ...
On the upper left hand side next to the amount of fans it says find more subjects ... Check there