Question

В коробке лежат синие,красные и зелёные карандаши.Всего их 18 штук.Синих карандашей в 6 раз больше,чем зелёных,а красных меньше,чем синих.Сколько в коробке красных карандашей?

Answer 1

Ответ: 4

Пошаговое объяснение:

Если синих в шесть раз больше, чем зелёных, то зелёных может быть 1 или 2, т.к. синих не может быть 18 штук. Если зелёный 1, то синих 6, и синих и зелёных - 7. Если всего 18 карандашей, то 18-7=11 красных, оставшихся карандашей. Но такого быть не может, т.к. по условию красных меньше, чем синих. Значит берём другой возможный вариант. Зелёных 2, тогда синих - 12. 2+12=14 карандашей зелёных и синих. Если всего 18, то 18-14=4 карандаша -красных. 12>4, то есть синих больше, чем красных. Все условия соответствуют.

Answer 2

Problem Analysis

We are given a box containing blue, red, and green pencils. The total number of pencils in the box is 18. The number of blue pencils is 6 times greater than the number of green pencils, and the number of red pencils is less than the number of blue pencils. We need to determine the number of red pencils in the box.

Solution

Let's assume the number of green pencils is x. According to the given information, the number of blue pencils is 6 times greater than the number of green pencils, so the number of blue pencils is 6x. The number of red pencils is less than the number of blue pencils, but we don't have an exact ratio or value. However, we know that the total number of pencils in the box is 18. Therefore, we can set up the following equation:

x + 6x + red pencils = 18

Simplifying the equation, we get:

7x + red pencils = 18

To solve for the number of red pencils, we need to find the value of x first.

Let's solve the equation to find the value of x:

7x = 18 - red pencils

Now, we need more information to determine the value of x and the number of red pencils. Unfortunately, the given information is not sufficient to find the exact number of red pencils in the box.

However, we can still provide a general solution. Let's assume a value for x and calculate the number of red pencils accordingly.

Calculation

Let's assume there are 2 green pencils in the box. Using this assumption, we can calculate the number of blue pencils and red pencils:

Number of green pencils (x) = 2 Number of blue pencils = 6 * x = 6 * 2 = 12 Number of red pencils = Total number of pencils - (Number of green pencils + Number of blue pencils) = 18 - (2 + 12) = 4

Therefore, if there are 2 green pencils in the box, there would be 4 red pencils.

Answer

Based on the given information, we cannot determine the exact number of red pencils in the box. However, if we assume there are 2 green pencils, then there would be 4 red pencils in the box.