Solutions by everydaycalculation.com
1630 - 1230 is 215.
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Related: 32/30-12/30 16/30-24/30 16/60-12/30 16/30-12/60 48/30-12/30 16/30-36/30 16/90-12/30 16/30-12/90 80/30-12/30 16/30-60/30 16/30-84/30
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