Предмет: Математика, автор: SAVFOREVER

Сколько существует таких натуральных чисел A, что из чисел A и A+20 четырехзначным является ровно одно. Помогите пожалуйста, срочно надо

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Автор ответа: iosiffinikov

0

Это числа от 980 до 999, т.е. 20 чисел.

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