Question
The ratio of Nathan's pens to Rachel's pens at first was 3 : 5. After Nathan gave Rachel 100 pens, the ratio of Nathan's pens to Rachel's pens is 1 : 3. What was the number of pens they had altogether?
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The ratio of Nathan's pens to Rachel's pens at first was 3 : 5. After Nathan gave Rachel 100 pens, the ratio of Nathan's pens to Rachel's pens is 1 : 3. What was the number of pens they had altogether?