Question
There were some black, gold and silver files in a box. 211 of the files were gold. The ratio of the number of black files to the number of silver files was 4 : 5. There were 291 fewer gold files than silver files.
  1. Find the ratio of the number of black files to the number of gold files to the number of silver files in the box.
  2. How many silver files 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 black, gold and silver files in a box. 211 of the files were gold. The ratio of the number of black files to the number of silver files was 4 : 5. There were 291 fewer gold files than silver files.
  1. Find the ratio of the number of black files to the number of gold files to the number of silver files in the box.
  2. How many silver files were there?