Question
There were some brown, black and gold pencils in a box. 213 of the pencils were black. The ratio of the number of brown pencils to the number of gold pencils was 4 : 7. There were 280 fewer black pencils than gold pencils.
  1. Find the ratio of the number of brown pencils to the number of black pencils to the number of gold pencils in the box.
  2. How many gold pencils were there?
4 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

There were some brown, black and gold pencils in a box. 213 of the pencils were black. The ratio of the number of brown pencils to the number of gold pencils was 4 : 7. There were 280 fewer black pencils than gold pencils.
  1. Find the ratio of the number of brown pencils to the number of black pencils to the number of gold pencils in the box.
  2. How many gold pencils were there?