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anemone
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Elias, Fiona and Simon had a total of 526 envelopes. Elias had the least number of envelopes. The ratio of Fiona's envelopes to Simon's envelopes was 5 : 4 at first. After Fiona and Elias had each lost $\dfrac{1}{2}$ of their envelopes, Fiona had 73 more envelopes than Elias. Given that the three of them had 359 envelopes left, how many envelopes did Elias have at first?
For those who are interested, if you want, you can try to solve this problem using the Singapore model method. (Nod)
For those who are interested, if you want, you can try to solve this problem using the Singapore model method. (Nod)