Page 34 - The 40 Ch. Book by James Hong or 洪祥智

7.4 American University dropout rate

In the United States, USA, what percentage of college
graduates. What is the dropout rate?
Gaussian curve score (Wikipedia): A (top 20%) B (20-50%) C

(50 to 80%) D / F (80 to 100%)
In the United States In USA

The first 80% pass the course; (4/5 ^ 3) += 50% This means that
only 50% have a bachelor's degree.

7.5 I solve the fifth theorem of ​Euclidean geometry

Prove that only one parallel line passes through a point outside
the line. (parallel to the line) My proof: draw a line
perpendicular to the horizontal line by point. 90 degrees exist.

Only one line through a point can be perpendicular to the
vertical line.

7.6 I solve the math problem

3. Are all even numbers the sum of the sum of prime numbers or
product of prime numbers?

Answer: 1. All even numbers are products of 2, so all even
numbers can be halved (double).
2. All even numbers can be divided into 1 + X and X is the

product.
3. You can add or add 2 prime numbers to make a variety of

combinations from all prime lists. You may find an infinite
number of values. This proves that almost all even numbers can
be the sum of two prime numbers. Or 2 prime products.

4. List all prime numbers, you can find infinitely many, prime
numbers.

7.7 Physical Mathematical Proof Derivation

4. Substituting Substitution
5. The equal sign is multiplied by the same value, something