1. Rubik’s Cube
By Angus Wai

2. Fun Facts!
A Rubik’s Cube has 43,252,003,274,489,856,000 possible configurations.
If you turned Rubik’s Cube once every second it would take you 1400
TRILLION YEARS to finish to go through all the configurations.
Every position of the Rubik's Cube can be solved in twenty
moves or less, it’s called the “God‘s Number”.

3. Rubik’s cube notations

4. How fast can I solve it?
1. 00: : : : : : : : : :14.73

5. Data (secs)
μ: σ:

6. Z-scores
x - μ
z = σ

7. Factors
Luck
Skill
Observation
Practice

8. Q#1 What is the probability that I can solve my Rubik’s cube within 40s?
Z-score of 40s = (40 – 59.8)/7.67 =-2.58 ∴ possibility is × 100% = 0.49%

9. Q#2 My friend challenged me to solve my Rubik’s cube within X seconds, I am 70% confident. Find X.
70% = z-score: 0.53 ∴ 0.53 × = 63.87s

10. Q#3 What is the median?
The median is: ( ) ÷ 2 = 59s.

11. Sources http://cube20.org
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