![Rhodri Marsden on Twitter: "Let's hear it for the Casio fx-85 solar powered calculator, just discovered in a box in the loft and still working perfectly 35 years after it was bought. Rhodri Marsden on Twitter: "Let's hear it for the Casio fx-85 solar powered calculator, just discovered in a box in the loft and still working perfectly 35 years after it was bought.](https://pbs.twimg.com/media/EttGt17XMAEGZHa.jpg:large)
Rhodri Marsden on Twitter: "Let's hear it for the Casio fx-85 solar powered calculator, just discovered in a box in the loft and still working perfectly 35 years after it was bought.
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