Question
There are 66 grey balls and 21 yellow balls in a basket. 611 of the grey balls are damaged. All the yellow balls are not damaged. How many more grey balls than yellow balls are not damaged?
4 m

Click button first when a symbol is required. X

There are 66 grey balls and 21 yellow balls in a basket. 611 of the grey balls are damaged. All the yellow balls are not damaged. How many more grey balls than yellow balls are not damaged?