WANT - Add algorithm for better practice

[John-Roy123]

• Have each account have a 13-20 (to be decided) character long array which will be used as a weight towards certain numbers when user is served questions
• Have the time taken and numbers involved in a question tracked so that a profile can be developed for each user as to which numbers they struggle with so they can be served more practice with those numbers
• Example array: [1,2,3,6,6,6,6,7,7,8,8,8,8,9,9], numbers will be generated 0-14 for the math problem, and depending on the number generated the user will be served the value in the array - this array is weighted towards 6 and 8.