Incrementation by Three
PART 1 of 2
STEP 1
Just count the numbers on the cycle, e.g. 036925814703692 etc. Know this by heart before you do step 2.
STEP 2
Do first as beginner, then migrate to slow, then medium, and then
fast. Keep up in counting along with the graphic progression.
Remember, 0 means any number that ends in a zero, like 10, or 40 , or
2430.
Good luck!
BEGINNER

SLOW 
MEDIUM 
FAST 
Other Ways of Doing Step 2
Here are three different speeds to address the same rote mastery: Narrow your browser window to focus on just one and start the counting from any number, e.g. with the zero in focus, you can start from ), or 10, or 40, or 50, or 160, etc.
SLOW
MEDIUM
FAST
FASTER
FASTEST
Step 2  Guess Third Number
SLOW
MEDIUM
FAST
Step 2  Guess Second Number
With only 2
characters, say the number before it appears.
SLOW
MEDIUM
FAST
To test yourself, pick a random number, and increment by three for the distance of a 100, e.g. if you start at 41, go till about 141.