Question

Лифт умеет ездить только на 8 этажей вверх или на 5 этажей вниз. Мы хотим доехать до 100 этажа. С какого этажа нам придется идти пешком?

Answer 1

Поднятие - до 8 этажа
спуск - на 5 этажей      в итоге мы на 3-ем этаже

итак каждый раз мы будем при поднятии на 8 и следующем спуске на 3,в итоге подниматься на 3 этажа вверх

100 : 3 =33 (ост 1)
33*3=99 этажей -возможное поднятие лифта

Ответ : с 99 этажа.

Answer 2

Calculation of the Starting Floor

To determine from which floor you will have to walk, let's analyze the given information. The elevator can travel 8 floors up or 5 floors down. You want to reach the 100th floor.

Since the elevator can only go up 8 floors at a time, we need to calculate how many times it will take to reach the 100th floor.

To calculate the number of times the elevator needs to go up, we can divide the total number of floors by the number of floors the elevator can travel in one trip.

The calculation is as follows:

100 / 8 = 12.5

Since we cannot have a fraction of a trip, we need to round up to the nearest whole number. Therefore, the elevator will need to make 13 trips to reach the 100th floor.

Now, let's calculate the number of floors covered by the elevator during these 13 trips:

13 trips * 8 floors per trip = 104 floors

So, the elevator will cover a total of 104 floors during these 13 trips. However, since we only need to reach the 100th floor, we can subtract the extra floors covered by the elevator:

104 floors - 100 floors = 4 extra floors

Therefore, you will have to walk 4 floors from the floor where the elevator stops after its final trip to reach the 100th floor.

Note: It's important to note that the calculation assumes that the elevator starts from the ground floor. If the elevator starts from a different floor, you will need to adjust the calculation accordingly.