Solutions by everydaycalculation.com
942 - 742 is 121.
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Related: 18/42-7/42 9/42-14/42 9/84-7/42 9/42-7/84 27/42-7/42 9/42-21/42 45/42-7/42 9/42-35/42 63/42-7/42 9/42-49/42
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