Предмет: Математика, автор: polina20050402

Для нумерации книги использовали 2052 цифры. Сколько страниц в этой книге?

Ответы

Автор ответа: nazarkoshlatyy

от 1 до 9 страницы - 9 цифр
от 10 до 99 страницы = 9*2*10=180
2052 -(180+9)=1863 (осталось)
1863/3 = 621 страница - из трех цифр
99+621=720
Ответ : в книге 720 страниц

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