Question

Федя и Оля ехали в одном поезде. Федя сел в двенадцатый вогон от головы поезда, а Олеся-в шестой вагон от хвоста поезда. Оказалась, что они едут в одном вагоне. Сколько вагонов в поезде?

Answer 1

$(12+6)-1=18-1=17$

Сложим количество вагонов, а т.к. они оказались в одном, то один вагон лишний.

Всего 17 вагонов.

Answer 2

Number of Train Cars in the Train

To determine the number of train cars in the train, we need to calculate the difference between the car numbers where Fyodor (Fedya) and Olesya (Olya) are seated.

According to the information provided, Fyodor is seated in the twelfth car from the head of the train, while Olesya is seated in the sixth car from the tail of the train.

To calculate the number of train cars, we need to add the car numbers from the head of the train to Fyodor's car and from the tail of the train to Olesya's car, and then subtract 1 (since the car they are both in should not be counted twice).

Let's calculate the number of train cars:

Car number from the head of the train to Fyodor's car: 12

Car number from the tail of the train to Olesya's car: 6

Total number of train cars: 12 + 6 - 1 = 17

Therefore, there are 17 train cars in the train.