Question

Расставьте все десять цифр 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 в таком порядке, чтобы получившееся число делилось на все числа от 2 до 18.Петя пошел из лагеря в город. В 12 часов, в а км от лагеря, его догнал велосипедист и подвез его немного. Затем велосипедист высадил Петю в а км от города, и в 14 часов Петя добрался до города. Сколько времени потратит Петя на обратную дорогу пешком, если известно, что скорость велосипедиста в два раза больше скорости Пети?ооооооооочччччееееенььь ннннаааадддддддо ППЛЛЛЛИИЗЗЗЗЗ!!!!решить невозможно!!!!!!!!!кто решит все свои баллы отдам

Answer 1

1)под эту задачу подхолит просто число 1234567890
2)я точно не уверена(как то маловато информации),но думаю что Петя потратил 4 часа(но реально не уверена)

Answer 2

Answer:

Part 1: Arranging the digits

To find a number that is divisible by all the numbers from 2 to 18, we need to arrange the digits 1, 2, 3, 4, 5, 6, 7, 8, 9, and 0 in a specific order. Unfortunately, it is not possible to arrange these digits in a way that the resulting number is divisible by all the numbers from 2 to 18.

Part 2: Petia's journey

According to the given information, Petia started his journey from the camp and was picked up by a cyclist who drove him a certain distance. Then the cyclist dropped Petia off a certain distance from the city, and Petia reached the city at 14:00. We are asked to find out how much time Petia will spend walking back if we know that the cyclist's speed is twice that of Petia's speed.

To solve this problem, we need to make some assumptions and calculations:

1. Let's assume that the distance between the camp and the city is represented by 'd' kilometers. 2. Petia was picked up by the cyclist at 12:00 and reached the city at 14:00, which means he spent 2 hours traveling by bicycle. 3. Since the cyclist's speed is twice that of Petia's speed, we can say that Petia's speed is 'x' km/h and the cyclist's speed is '2x' km/h. 4. Petia traveled 'a' kilometers by bicycle and 'b' kilometers on foot. The sum of these distances should be equal to 'd'. 5. We can set up the following equation to represent the time Petia spent traveling: (a / (2x)) + (b / x) = 2.

Now, let's solve the equation to find the values of 'a' and 'b':

(a / (2x)) + (b / x) = 2

Multiplying both sides of the equation by 2x, we get:

a + 2b = 4x

Since a + b = d, we can substitute 'd' for 'a + b' in the equation:

d + b = 4x

Solving for 'b', we get:

b = 4x - d

Now, we need to find the time it takes for Petia to walk back from the city to the camp, which is the distance 'b' divided by Petia's walking speed 'x':

Time = b / x = (4x - d) / x = 4 - (d / x)

Therefore, Petia will spend 4 - (d / x) hours walking back from the city to the camp.

Please note that without knowing the specific values of 'd' and 'x', we cannot determine the exact time Petia will spend walking back.