Solutions by everydaycalculation.com
1842 - 1042 is 421.
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Related: 36/42-10/42 18/42-20/42 18/84-10/42 18/42-10/84 54/42-10/42 18/42-30/42 90/42-10/42 18/42-50/42 18/42-70/42
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