📊 Most Students Fail the TSI Because They Forget These Formulas
Not because the math is too hard…
But because they don’t remember what to use.
👉 Try this:
What is the area of a triangle with base 10 and height 6?
A) 60
B) 30
C) 16
D) 20
✅ Correct Answer: B) 30
💡 Explanation:
Triangle area formula:
Area = (1/2) × base × height
= (1/2) × 10 × 6 = 30
⚠️ If you didn’t remember that formula instantly, you’re at risk on the TSI.
🧠 TSI Math Formulas You Must Know
7
Below are the most important formulas you need to pass.
🔢 Algebra Formulas
1. Linear Equation Formula
👉 Used to solve basic equations
Example:
3x + 5 = 20
→ 3x = 15
→ x = 5
🧠 Practice Question
Solve:
2x + 6 = 14
A) 3
B) 4
C) 5
D) 6
✅ Answer: B) 4
2. Exponent Rule
👉 When multiplying powers:
x² × x³ = x⁵
(Add exponents)
🧠 Practice Question
Simplify:
x³ × x⁴
A) x⁷
B) x¹²
C) x⁶
D) x¹
✅ Answer: A) x⁷
📐 Geometry Formulas
3. Area of a Rectangle
Area = length × width
Example:
5 × 4 = 20
🧠 Practice Question
Area of rectangle with sides 8 and 3:
A) 11
B) 24
C) 16
D) 20
✅ Answer: B) 24
4. Area of a Triangle
Area = (1/2) × base × height
🧠 Practice Question
Base = 12, height = 4
A) 24
B) 48
C) 16
D) 20
✅ Answer: A) 24
5. Area of a Circle
Area = πr²
🧠 Practice Question
Radius = 3
A) 6π
B) 9π
C) 12π
D) 3π
✅ Answer: B) 9π
📊 Percentage Formula
6. Percentage Calculation
Percentage = (part / whole) × 100
🧠 Practice Question
What is 25% of 200?
A) 25
B) 40
C) 50
D) 75
✅ Answer: C) 50
📈 Slope Formula
7. Slope of a Line
Slope = (y₂ − y₁) / (x₂ − x₁)
🧠 Practice Question
Points: (2,3) and (4,7)
A) 2
B) 3
C) 4
D) 1
✅ Answer: A) 2
🚨 Most Common TSI Math Formula Mistakes
❌ Forgetting the Formula
Students often:
- Guess
- Try to “figure it out”
👉 This wastes time.
❌ Using the Wrong Formula
Example:
- Using rectangle formula for triangle
❌ Not Applying Correctly
Even if you know it, you must:
- Plug values correctly
- Avoid calculation mistakes
⚠️ The TSI is not testing advanced math…
It’s testing how well you use basic formulas under pressure.
🎯 How to Remember TSI Math Formulas Fast
✔ Practice Daily
- 20–30 questions
- Repeat formulas
✔ Use Real Questions
Memorizing formulas alone is not enough.
👉 You must apply them.
✔ Focus on Weak Areas
- Geometry
- Percentages
- Algebra basics
🚀 Practice These Formulas on a Full TSI Test
Want to see if you’re ready?
👉 Take a full TSI practice test here
📚 What you’ll get:
- Real exam-style questions
- Instant score
- Weak area breakdown
- Answer explanations
❓ FAQ – TSI Math Formulas
Do you get a formula sheet on the TSI?
No — you must memorize key formulas.
What math is on the TSI?
- Algebra
- Geometry
- Basic statistics
Is TSI math hard?
No—but mistakes happen when you don’t know formulas.
What should I memorize for TSI math?
- Area formulas
- Percentages
- Basic algebra rules
🔥 Final Advice
If you don’t know these formulas…
👉 You will struggle on the TSI.
If you do…
👉 You’re already ahead of most students.
