Created
June 26, 2011 19:18
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#!/usr/bin/env ruby | |
# -*- coding: utf-8 -*- | |
class Integer | |
# sayi basamaklarini array olarak dondurur | |
def digits | |
self.to_s.split(//).map!(&:to_i) | |
end | |
end | |
b3_c81 = (1..999).select {|s| s.digits.reduce(:*) == 81} | |
puts "basamak carpimi 81 olan 3 basamaga kadar #{b3_c81.size} sayi var" | |
puts "basamak carpimi 81 olan 3 basamaga kadar sayilar #{b3_c81}" | |
b3_c12_max = (1..999).select {|s| s.digits.reduce(:*) == 12}.max | |
b3_c12_max_dt = b3_c12_max.digits.reduce(:+) | |
puts "basamak carpimi 12 olan 3 basamakli en buyuk sayi #{b3_c12_max}" | |
puts "basamak carpimi 12 olan 3 basamakli en buyuk sayinin basamaklari toplami #{b3_c12_max_dt}" | |
__END__ | |
basamak carpimi 81 olan 3 basamaga kadar 7 sayi var | |
basamak carpimi 81 olan 3 basamaga kadar sayilar [99, 199, 339, 393, 919, 933, 991] | |
basamak carpimi 12 olan 3 basamakli en buyuk sayi 621 | |
basamak carpimi 12 olan 3 basamakli en buyuk sayinin basamaklari toplami 9 |
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