Last point to this subject: All together 3 + 4 +5 together are the so called "Pythagorean right angled triangle" you can even dram it on paper 😃 (Sides: 3cm, 4cm, 5cm (hypotenuse))
Trivium (3): Grammatic, Rethoric, Logic : => Logos (Truth) Quadtrivium (4): Arithmetic (study of numbers); - Geometry (Aestetics; Geography and Natural History); - Music & Arts (Music Theory); - Astronomie/Astrology (and some more, depend on the source you have; Psychology, Philosophy,...) Senses (5): Instruments of knowledge; to know our surroundings and so called reality
