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The annual ritual of buying a gift for a random recipient opens a window onto some fascinating mathematics.
Secret Santa: 20 people, 2.4 quintillion possibilities - Indian Link
Percentage of children who believe in Santa
World Screen MIPCOM October 2021 by World Screen - Issuu
MISSION TO PSYCHE
Belief in Santa - NeuroLogica Blog
December, 2006
2022.12.02, FFRP Brings Good News about More Butterflies, More Trees
News - March, 2019
Venice gondolier sun.
Statistics – News, Research and Analysis – The Conversation – page 1
The Secret Santa Problem – Singular Points
combinatorics - Probability that Secret Santa arrangement will result in perfect pairings - Cross Validated
The (Surprisingly Difficult) Math of Secret Santa, by Egemen Ökte