Solutions by everydaycalculation.com
2021 - 121 is 1921.
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Related: 40/21-1/21 20/21-2/21 20/42-1/21 20/21-1/42 60/21-1/21 20/21-3/21 20/63-1/21 20/21-1/63 20/21-5/21 20/21-7/21
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