Solutions by everydaycalculation.com
1042 - 642 is 221.
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Related: 20/42-6/42 10/42-12/42 10/84-6/42 10/42-6/84 30/42-6/42 10/42-18/42 50/42-6/42 10/42-30/42 70/42-6/42
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