Question
There were some grey, brown and black pencils in a box. 112 of the pencils were brown. The ratio of the number of grey pencils to the number of black pencils was 4 : 7. There were 258 fewer brown pencils than black pencils.
  1. Find the ratio of the number of grey pencils to the number of brown pencils to the number of black pencils in the box.
  2. How many black 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 grey, brown and black pencils in a box. 112 of the pencils were brown. The ratio of the number of grey pencils to the number of black pencils was 4 : 7. There were 258 fewer brown pencils than black pencils.
  1. Find the ratio of the number of grey pencils to the number of brown pencils to the number of black pencils in the box.
  2. How many black pencils were there?