# Impossible Puzzle

> Puzzle published by Hans Freudenthal

**Wikidata**: [Q1878412](https://www.wikidata.org/wiki/Q1878412)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Sum_and_Product_Puzzle)  
**Source**: https://4ort.xyz/entity/impossible-puzzle


## References

1. Freebase Data Dumps. 2013