## Task 4 - 150614

A pioneer group collects waste paper. During the settlement, it was found that the collection result of the last two days accounted for a quarter of the total amount collected, and on the last day, $27 \mathrm{~kg}$ were collected, which was $6 \mathrm{~kg}$ more than the day before.

How many kilograms did the total amount of collected waste paper amount to?
On the last day, $27 \mathrm{~kg}$ had been collected, and on the second-to-last day, due to $27-6=21$, it was $21 \mathrm{~kg}$.

Because $27+21=48$, the collection result of the last two days was therefore $48 \mathrm{~kg}$. Since this was a quarter of the total amount achieved, this amount is four times $48 \mathrm{~kg}$, which is $4 \cdot 48=192$, so $192 \mathrm{~kg}$ of waste paper.

Solutions of the I. Round 1975 adopted from [5]

### 3.16.2 II. Round 1975, Class 6