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Antiques Roadshow

Age 14 to 16 Short Challenge Level:

The price increased by 30,000 times the original amount, so the profit was 29,999 times the original amount, which is a 2,999,900% profit.

This is approximately 3,000,000% profit.

This problem is taken from the UKMT Mathematical Challenges.
You can find more short problems, arranged by curriculum topic, in our short problems collection.