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#2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder.
#What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?
describe "problem five" do
def divisible_by?(number)
return number % 2 == 0 &&
number % 3 == 0 &&
number % 4 == 0 &&
number % 5 == 0 &&
number % 6 == 0 &&
number % 7 == 0 &&
number % 8 == 0 &&
number % 9 == 0 &&
number % 10 == 0 &&
number % 11 == 0 &&
number % 12 == 0 &&
number % 13 == 0 &&
number % 14 == 0 &&
number % 15 == 0 &&
number % 16 == 0 &&
number % 17 == 0 &&
number % 18 == 0 &&
number % 19 == 0 &&
number % 20 == 0
end
def smallest
n = 20
loop do
return n if divisible_by?(n)
n = n + 20
end
end
it 'produces the answer' do
expect(smallest).to eql(232792560)
end
end
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