Vortex Math: Summing the Digits of a Number is just the Remainder by @mes on 3Speak
▶️ Watch on 3Speak --- In this video I show that the "vortex sum" of a number (summing up the digits until obtaining a single digit is obtained) is just the remainder when dividing the number by 9....
Tags: #math #science #vortexmath #modulararithmetic #education #stemgeeks #chessbrothers #scifimultiverse #algebra