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MathNet 2025-part-01 — 187 problems (EN–VI) Question 106

Math Olympiad Vault · MathNet 2025-part-01 — 187 problems (EN–VI)

Question 106

Uchral, together with a few friends, bought some books and some notebooks from a store. The price of one book is $A$ times more expensive than one notebook. Uchral and her friends decided to divide the purchased books and notebooks such that the monetary value each person receives is equal.

Uchral received $\frac{1}{10}$ of all the books and $\frac{1}{15}$ of all the notebooks. When she counted the number of books and notebooks she received, she noticed that the number of notebooks she received was 6 times the number of books she received.

Find all possible values of $A$.

(Batzorig Undrakh)