A beginner's guide to five-number, three-digit-target questions
Learn useful formulas for five-number questions with three-digit targets, with worked examples.
- Learning
Blog
Release notes-
Which pair of digits is the most useful?
Discover the most versatile pairs of digits and the values they can create.
- Learning
What do the levels in Fastmath mean?
Find out how Fastmath's levels compare with competition rules.
- General
What is exponentiation?
Review the laws of exponents and useful powers for mental arithmetic.
- Learning
What is sigma notation?
Understand the basics of sigma notation and how to use it.
- Learning
What is a factorial?
What does the ! symbol mean? The Fastmath team explains.
- Learning
The order of operations
Addition, subtraction, multiplication, division—which should you calculate first?
- Learning
How to use up leftover numbers
Learn four common ways to use leftover numbers in mental arithmetic equations.
- Techniques
A review of Fastmath.io
By Kru Ya (Yanai Loetthanayothin), creator of the “Mental Arithmetic 180 IQ” page.
- Reviews