In arithmetic The Eye of Horus with fractions:
In the Ancient Egyptian measurement system, the Eye of Horus was used a form of fractional notation, each of the parts of the eye representing a different fraction. The parts of the eye were divided as follows:
"1/2 was represented by smell, symbolized by the right side of the eye in a form of the nose. The pyramid text says: "Behold [the fire] rises in Abydos and it comes; I cause it to come, the Eye of Horus. It is set in order upon thy brow, O Osiris Khenti-Amenti; it is set in the shrine and rises on thy brow."
"1/4 was represented by sight or the sensation of light, symbolized by the pupil. The pyramid text says: "Perfect is the Eye of Horus. I have delivered the Eye of Horus, the shining one, the ornament of the Eye of Ra, the Father of the Gods."
"1/8 was represented by thought, symbolized by the eyebrow. The pyramid text says: - the Eye of Horus hath made me holy - I will hide myself among you, O ye stars which are imperishable. My brow is the brow of Ra."
"1/16 was represented by hearing, symbolized by right side of the eye in the form of an arrow pointing towards the ear. The pyramid text says: "That which has been shut fast/dead hath been opened by the command of the Eye of Horus, which hath delivered me. Established are the beauties of the forehead of Ra."
"1/32 was represented by taste, by the sprouting of wheat or grain from the planted stalk, symbolized by a curved tail. The pyramid text says: "Come, the Eye of Horus hath delivered for me my soul, my ornaments are established on the brow of Ra. Light is on the faces of those who are in the members of Osiris."
"1/64 was represented by touch, symbolized by a leg touching the ground. The pyramid text says: "I shall see the Gods and the Eye of Horus burning with fire before my eyes." (from someone on Facebook)
See Also
All Seeing Eye
Arithmetic
Eye of Ra
Ancient Egyptian Units of Measurement
Hekat
Maat
Music
Ratio
Royal Cubit
Sympsionics
Thoth