How do I generate the first n prime numbers?

Question

I am learning Ruby and doing some math stuff. One of the things I want to do is generate prime numbers.

I want to generate the first ten prime numbers and the first ten

Answer 1

I think this may be an expensive solution for very large max numbers but seems to work well otherwise:

def multiples array
  target = array.shift 
  array.map{|item| item if target % item == 0}.compact
end

def prime? number
  reversed_range_array = *(2..number).reverse_each
  multiples_of_number = multiples(reversed_range_array)
  multiples_of_number.size == 0 ? true : false
end

def primes_in_range max_number
  range_array = *(2..max_number)
  range_array.map{|number| number if prime?(number)}.compact
end