a questions

1.2520 is the smallest nuber that can be diveded by each of the number 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?

Use ruby to solve this problem

b=Array.new

c = gets.chomp

a = 1..c.to_i

jc=1

a.each do |elem|

    b<<elem.to_i

end

b.each do |e|

    jc *= e 

end

x=b.max 

sum=1

co = 1*x

x.upto(jc) do |i|

        sum=0

        b.each do |f|

            sum += (i%f)

        end

        if sum == 0

            co=i

            break

    end

end

puts "The common multiple is #{co}" 

 ....

(1..20).to_a.reduce :lcm