GuideUpdated Nov 2026 · 1 min read
ACET Formula Sheet
The formulas worth knowing before the test.
IAI does not publish a formula list here, so this is our own revision summary of standard maths and statistics.
Core Formulas
AP sumn/2 x (2a + (n-1)d)
GP suma(r^n - 1) / (r - 1)
Quadratic roots(-b ± sqrt(b^2 - 4ac)) / 2a
CombinationnCr = n! / (r!(n-r)!)
Conditional probabilityP(A|B) = P(A and B) / P(B)
Binomial mean and variancenp and np(1-p)
Z-score(X - mean) / SD
| Topic | Formula |
|---|---|
| AP sum | n/2 x (2a + (n-1)d) |
| GP sum | a(r^n - 1) / (r - 1) |
| Quadratic roots | (-b ± sqrt(b^2 - 4ac)) / 2a |
| Combination | nCr = n! / (r!(n-r)!) |
| Conditional probability | P(A|B) = P(A and B) / P(B) |
| Binomial mean and variance | np and np(1-p) |
| Z-score | (X - mean) / SD |
FAQs
Does IAI publish a formula sheet?expand_more
Not that we rely on here. Check IAI's current ACET syllabus.
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