Question
There are 66 grey balls and 25 gold balls in a basket. 511 of the grey balls are damaged. All the gold balls are not damaged. How many more grey balls than gold balls are not damaged?
4 m

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There are 66 grey balls and 25 gold balls in a basket. 511 of the grey balls are damaged. All the gold balls are not damaged. How many more grey balls than gold balls are not damaged?