Mathematics Knowledge is knowledge-dependent, so it moves slower than Arithmetic Reasoning. The fastest gains come from drilling formulas to automatic recall first — fifteen minutes a day of formula recall beats an hour of problems you cannot start. Allow four to six weeks.
Mathematics Knowledge is one of the four AFQT subtests, so it counts directly towards whether you can enlist. See how the AFQT is built.
Sign errors on negatives
The single most common source of lost marks. Distributing a negative across brackets, subtracting a negative, squaring a negative — each has a wrong answer waiting in the options. Slow down specifically at the point a minus sign enters.
Hunting for formulas you should know cold
If you are reconstructing the area of a circle mid-question, you have already lost the time you needed to answer it. The geometry and algebra formulas are a short list. Get them to instant recall before you practise problems at all.
Order of operations with exponents and roots
Exponents bind tighter than multiplication, and a root is an exponent. Most people know this and still slip under time pressure. Write each step on its own line rather than collapsing it mentally.
Slower than AR, because you cannot technique your way past a formula you do not know. Expect four to six weeks. The payoff is that MK knowledge is stable once learned — it does not decay the way reading pace does.