Thanks. Just for information, turkish have of course plural forms but doesn't need to use them with numbers .For exmaple: kalem(pencil)>singular kalemler(pencils)>plural.Turkish people say "Bu kalemler"(These pencils) but a word with a number "Bu 5 kalem"(These 5 pencils).This is because of the systematic nautre of the language.Numbers already represent plural forms.Again, thanks for your help