Предмет: Математика, автор: luckynice228

Задумано двузначное число, которое делится на 7. После к нему справа приписали это же число ещё раз. Оказалось, что получившееся четырёхзначное число делится на 13. Какое число было первоначально? (Запиши наименьшее из чисел.)

Ответы

Автор ответа: dimon4ik29

Ответ:

Пошаговое объяснение:

Пусть x — задуманное число

Тогда полученное четырехзначное число равно 101x

101 простое число

101х по условию, делится на 13 и на 47

Так как 13 и 4 взаимопростые то x = 13*7 = 91

Задумано

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