The latest edition of my Number Sense Manual:
Number Sense Tricks (Rev A) // 4-12-2018
If you have any individual questions on how to quickly solve test problems, feel free to e-mail me at: 
. I’ve already gotten about a hundred inquiries and I always like getting feedback from users, so thanks!
If you are looking for some practice tests, here are some I’ve created using my auto-generating program:
High School Number Sense Practice Tests
Middle School Number Sense Practice Tests