ACT Official Style · 20 Questions

Hard-Level
ACT Math Exam

Covering all tested domains — from Pre-Algebra to Advanced Algebra & Trigonometry. Authentic difficulty, full explanations.

Questions

20

Time Limit

35 min

Difficulty

Hard ★★★

Format

5-Choice MCQ

📐 Key Formulas to Memorize

Quadratic Formula: x = (−b ± √(b²−4ac)) / 2a
Distance: d = √((x₂−x₁)²+(y₂−y₁)²)
Circle: (x−h)²+(y−k)²=r²
Law of Sines: a/sinA = b/sinB = c/sinC
Arc Length: s = rθ (θ in radians)
Log: log_b(x·y)=log_b(x)+log_b(y)

💡 ACT Strategy Tips

Eliminate obviously wrong answers first — saves ~30 sec per question
Plug answer choices back into the original equation when stuck
Draw diagrams for geometry — even rough sketches help
On time problems: mark & skip; return before the clock runs out
Check units — ACT often hides unit mismatches as traps