(Despite first impressions, this post is not about computers.)

EDIT: I made a THA-1 Solver where you can try out THA-1 hashing. Although, there’s no point to it because you cant visit RogerHub during a test...

Today, I will be authoring a new cryptography algorithm called THA-1 (Test Hashing Algorithm Version 1)

THA-1 is a very simple method of verifying your (school) test answers so that you can compare with other people afterward :)

Instead of memorizing 1 is A, 2 is C, 3 is E, 4 is B... You can just memorize one big number (ex. 56)

The downside to this is that, you only know get two possible outcomes:

• Answers all match
  

• Answers don’t all match

But that’s the point of hashing right?

Requirements:
- Ability to Add
- Ability to Multiply (They’re small numbers, don’t worry)
- Understanding of Modular Arithmatic
- Ability to memorize a 2 or 3 digit number.

Here are the rules for THA-1:

1. THA-1 will accept only multiple-choice, matching, and true-false test questions. So, short answer, fill-in-the-blank(s), and free response will not work for this!

2. To start out, each answer is assigned a value.

A is 1, B is 2, C is 3.... Z is 26
True is 1 False is 2

Double letters will have their numbers added up.
For example: AC will turn into 1+3 = 4

3. Multiply each answer by it’s question number MOD 10. Meaning: for #14, if you get B, do 2(b) x 4(#14), not 2x14 because 2x14 is too hard :).. (not really)

Example:
1. A (1x1=1)
2. C (3x2=6)
3. D (3x4=12)
4. D (4x4=16)
5. B (2x5=10)
6. C (3x6=18)

If any of these products are more than 20, take the modular remainder by 20.

Ex:
23 => 3
57 => 17

4. Add up all the sums! Don’t forget to take the remainder of any of the sums are more than 20.

Example:
1. A (1x1=1)
2. C (3x2=6)
3. D (3x4=12)
4. D (4x4=16)
5. B (2x5=10)
6. C (3x6=18)

1+6+12+16+10+18 = 63

(Seriously, if that took you more than 15 seconds, this method will not work for you...)

That’s it! You’re done. After the very-short 6 question test, tell people "69" (it was a coincidence, i swear). If other people get answers that are different from yours, then one of you missed at least one question. (Either that or one of you did your math wrong.)

Yeahh... there might be some resonance (lol) or even a better way to hash test problems. That’s why this is only Version 1. If you have any classes with me, we should try this out sometime :)

Another example:

1. True (1x1=1)
2. False (2x2=4)
3. True (1x3=3)
4. True (1x4=4)
5. A (1x5=5)
6. B (2x6=12)
7. D (4x7=28 = 8 Mod 20) <<So, use 8 instead of 28 on this one.
8. C (3x8=24 => 4) << same thing here
9. E (5x9=45 => 5)
10. AB ((1+2)x0=0 => 0) <<Remember, AB turns into 1+2, which equals 3. Also, because 10%10=0, you use 0 instead of 10.
11. AD ((1+4)x1=5)
12. AC ((1+3)x2=8)
13. AE ((1+5)x3=18)
14. BC ((2+3)x4=20 => 0) << 20 remainder 20 equals 0, not 20.

So, 1+4+3+4+5+12+8+4+5+0+5+8+18+0 = 77

Your THA-1 Hash is 77!
Yay!

Yeahh. Extra math.. Not fun. But, if you’re really anxious about your test score, this is a fool-proof way to remember your test answers. Granted that you didn’t do the math wrong.

If you’re a strait-B student, don’t even bother using this. This is meant for Asians that get 100%’s frequently.

Wait, so did you get 77? If not you got one of the problems wrong :)

And Happy Thanksgiving again...

-Roger

In other news... I broke the shelf thing that was in my locker today. I was trying to get it out and the hinge came off. SO, i just threw it away..

Now that i think of it, I should have recycled.