Institut quantique just released its latest Quantum Enigma – The Birthdays on YouTube : https://www.youtube.com/watch?v=g2ChaEAsO3E&t=1s
You are invited to a reception at Aïka’s house with your friends Bob, Charlie and Dahlia. At the door, you learn that Aïka has restricted the number of people allowed. You will have to determine the minimum number of people so that there is more than a 50% chance that two people have the same birthday.
A classic problem solved on a quantum circuit!
Be sure to check out as well as the Qiskit Problem Sets designed around the Quantum Enigmas : https://www.usherbrooke.ca/iq/quantumenigmas/