Real-world examples of the number eight.

📚 Quick Study Guide

• ♾️ The number eight is a natural number following 7 and preceding 9.
• 🔢 It is an even number.
• ➕ In mathematics, 8 is a composite number; its proper divisors are 1, 2, and 4.
• ✨ It is the cube of 2 ($2^3 = 8$).
• 📐 An octagon is a polygon with eight sides.
• 🎵 An octave in music spans eight notes.
• 💻 In computer science, an octet is a group of 8 bits, commonly called a byte.

Practice Quiz

1. What geometric shape has eight sides?
   1. A) Hexagon
   2. B) Heptagon
   3. C) Octagon
   4. D) Nonagon
2. In music, what is a series of eight notes called?
   1. A) Chord
   2. B) Octave
   3. C) Scale
   4. D) Duet
3. What is $2^3$ equal to?
   1. A) 4
   2. B) 6
   3. C) 8
   4. D) 9
4. How many bits are in an octet (byte) in computer science?
   1. A) 4
   2. B) 6
   3. C) 8
   4. D) 10
5. Which of the following numbers is a proper divisor of 8?
   1. A) 3
   2. B) 5
   3. C) 6
   4. D) 4
6. What type of number is 8?
   1. A) Odd
   2. B) Prime
   3. C) Even
   4. D) Imaginary
7. How many legs does an octopus have?
   1. A) 6
   2. B) 8
   3. C) 10
   4. D) 12