Question

В магазине Юра купил линейку, карандаши и ручку. Линейка стоит 3 рубля ,карандаши дороже линейки в 6 раз, а ручка дешевле карандашей в 2 раза, Сколько стоят карандаши? Сколько стоит ручка? На сколько рублей карандаши дороже линейки? Сколько стоит вся покупка?

Answer 1

Карандаши стоят 3+6=9 ,а ручка 6-2=4

Answer 2

Problem Analysis

To solve this problem, we need to find the prices of the pencils, ruler, and pen based on the given information. We are given that the ruler costs 3 rubles, the pencils are 6 times more expensive than the ruler, and the pen is 2 times cheaper than the pencils. We also need to calculate the total cost of the purchase.

Solution

Let's start by calculating the cost of the pencils, then the cost of the pen, and finally the total cost of the purchase.

1. Calculate the Cost of the Pencils: - Given that the ruler costs 3 rubles and the pencils are 6 times more expensive than the ruler, we can calculate the cost of the pencils.

The cost of the pencils = 6 * 3 rubles

The cost of the pencils = 18 rubles

The pencils cost 18 rubles.

2. Calculate the Cost of the Pen: - Given that the pen is 2 times cheaper than the pencils, we can calculate the cost of the pen.

The cost of the pen = (1/2) * 18 rubles

The cost of the pen = 9 rubles

The pen costs 9 rubles.

3. Calculate the Price Difference Between the Pencils and the Ruler: - We can calculate the price difference between the pencils and the ruler.

Price difference = Cost of pencils - Cost of ruler

Price difference = 18 rubles - 3 rubles

Price difference = 15 rubles

The pencils are 15 rubles more expensive than the ruler.

4. Calculate the Total Cost of the Purchase: - To find the total cost, we sum the costs of the ruler, pencils, and pen.

Total cost = Cost of ruler + Cost of pencils + Cost of pen

Total cost = 3 rubles + 18 rubles + 9 rubles

Total cost = 30 rubles

The total cost of the purchase is 30 rubles.

Conclusion

Based on the given information, the pencils cost 18 rubles, the pen costs 9 rubles, the pencils are 15 rubles more expensive than the ruler, and the total cost of the purchase is 30 rubles.