Question

Автору данной книги в 1989 году исполнилось столько лет, сколько сумма цифр его года рождения.В каком году он родился?

Answer 1

скорее всего автор родился в 20 веке,поэтому первые две цифры числа известы : 1 и 9,остальные надо подобрать так,чтобы выполнялось равенство,Ц3 и Ц4 это третья и четвертая цифра

Ц3+Ц4+10=89-10Ц3-Ц4

11Ц3+2Ц4=79

догадываеся,что это Ц3=7 и Ц4=1

тогда год 1971

Answer 2

Calculation of the Author's Birth Year

To determine the birth year of the author, we need to find the sum of the digits in the year 1989.

The sum of the digits in a number is calculated by adding each individual digit together. In this case, we need to find the sum of the digits in the number 1989.

Let's calculate the sum of the digits in 1989:

1 + 9 + 8 + 9 = 27

Therefore, the sum of the digits in the year 1989 is 27.

Now, we need to find the year in which the author was born. The year in which the author was born will have a sum of digits equal to 27.

Unfortunately, the search results did not provide a direct answer to the birth year of the author. However, we can try to find the answer by searching for the birth year of the author based on the given information.

Please note that the search results provided snippets that do not directly answer the question. Therefore, we cannot provide a definitive answer to the birth year of the author based on the available information.

If you have any additional information or context about the author or the book, please provide it, and we will do our best to assist you further.