Most Repeated NECO Mathematics Topics, Questions and Answers 2025/2026

As you prepare for the NECO Mathematics exam in 2025/2026, it’s important to know the most repeated topics, questions, and answers in NECO Mathematics. Focusing on these commonly tested areas will help you prepare smarter, practice effectively, and increase your chances of passing with a high score.

In this post, I’ll be showing you the most repeated NECO Mathematics topics, questions, and answers for the 2025/2026 exam. If you've been asking yourself questions like:
What are the most common NECO Mathematics questions?, What are the key topics in NECO Mathematics every year?, How can I study effectively for NECO Mathematics?, What are the most repeated NECO Mathematics theory and objective questions?, What is the area of concentration for Mathematics in NECO?, Where can I find NECO Mathematics past questions with answers?, Which topics appear yearly in NECO Mathematics?, Are there repeated questions in NECO Mathematics exams?, Can I pass Mathematics by studying only past questions?, and What are the most likely NECO Mathematics questions in 2025/2026? — then this guide is for you.

Why Study the Most Repeated NECO Mathematics Topics and Questions?

NECO Mathematics covers a wide range of concepts from arithmetic and algebra to geometry and statistics. While the exam varies from year to year, certain topics and question types are almost always repeated.

Studying the most frequently asked topics will help you:

• Focus on areas that matter the most

• Practice the exact types of questions NECO loves to ask

• Save time by targeting your revision

• Avoid surprises in the exam hall

• Boost your speed, accuracy, and confidence

Now let’s look at the topics and questions NECO repeats the most.

Most Repeated NECO Mathematics Topics (2025/2026)

Below are the 15 key topics NECO tests almost every year in Mathematics. Focus your revision on these:

1. Number Bases

• Conversion between bases

• Arithmetic operations in different bases

2. Fractions, Decimals, and Percentages

• Conversions

• Operations and applications in real-life problems

3. Ratio, Proportion, and Rate

• Simple interest, profit and loss

• Currency conversion

4. Algebraic Expressions

• Expansion and factorization

• Simplification of expressions

5. Linear and Quadratic Equations

• Solving simple and simultaneous equations

• Word problems involving equations

6. Inequalities

• Representing inequalities on number lines

• Solving linear inequalities

7. Logarithms and Indices

• Laws of indices

• Solving logarithmic equations

8. Geometry (Plane and Solid Shapes)

• Perimeter, area, and volume

• Properties of triangles, quadrilaterals, and circles

9. Trigonometry

• Sine, cosine, and tangent of angles

• Trigonometric ratios and word problems

10. Mensuration

• Volume and surface area of cubes, cylinders, cones, and spheres

• Application to real-world problems

11. Statistics

• Mean, median, mode

• Cumulative frequency and histograms

12. Probability

• Basic probability concepts

• Theoretical and experimental probability

13. Sets and Venn Diagrams

• Union, intersection, and complements

• Problem-solving using Venn diagrams

14. Graphs

• Drawing and interpreting linear and quadratic graphs

• Graphical solutions to equations

15. Matrix and Transformation

• Addition and multiplication of matrices

• Reflection, rotation, translation, and enlargement

Most Repeated NECO Mathematics Questions (2025/2026)

Here are examples of Mathematics questions NECO repeats regularly:

• Convert 101101₂ to base 10.

• Simplify: 23+35\frac{2}{3} + \frac{3}{5}32​+53​

• A man bought a phone for ₦25,000 and sold it at a profit of 20%. Find the selling price.

• Factorize: x2−9x+20x^2 - 9x + 20x2−9x+20

• Solve the simultaneous equations: $2x+y=7$ and $x-y=3$

• Find the area of a triangle with base 10cm and height 12cm.

• Solve: log⁡10x=2\log_{10}x = 2log10​x=2

• A box contains 3 red balls and 2 blue balls. What is the probability of picking a red ball?

• Draw the graph of y=x2−4x+3y = x^2 - 4x + 3y=x2−4x+3

• Find the median of: 4, 8, 6, 10, 12

• Write the matrix multiplication of:

[1201]×[35]\begin{bmatrix} 1 & 2 \\ 0 & 1 \end{bmatrix} \times \begin{bmatrix} 3 \\ 5 \end{bmatrix}[10​21​]×[35​]

• Represent the inequality $x+3>5$ on a number line

• Find the length of the side of a square whose area is 64cm²

• From a pack of 52 cards, what is the probability of selecting a king?

👉 Click here to access NECO Mathematics past questions and complete answers (PDF)

Study Tips to Use NECO Mathematics Questions and Topics Effectively

Here’s how to study NECO Maths the smart way:

✅ Practice Calculations Daily

Use a timer. Solve questions under exam conditions to build speed and confidence.

✅ Master Formulas and Theorems

Create a summary sheet for area, volume, interest, trigonometry, and algebra formulas.

✅ Use Past Questions

Target questions from the topics listed above. NECO repeats them often.

✅ Work from Simple to Complex

Start with arithmetic and algebra before moving to trigonometry or matrices.

✅ Solve Word Problems Frequently

NECO includes real-life word problems — especially in interest, profit/loss, and distance/time.

✅ Join a Study Group or Get a Tutor

Mathematics is best learned with discussion and practice.

✅ Learn from Mistakes

Review every question you get wrong especially in mock or practice exams.

❓FAQ – Most Repeated NECO Mathematics Topics, Questions and Answers

1. Are NECO Mathematics questions repeated every year?

Yes. NECO repeats questions in areas like algebra, statistics, interest, and geometry.

2. What are the most repeated topics in NECO Mathematics?

Algebra, trigonometry, probability, graphs, and number bases are highly repeated.

3. How can I pass NECO Mathematics?

Practice past questions, know your formulas, and focus on the repeated topics above.

4. Can I use WAEC past questions for NECO Mathematics?

Yes. Both exams follow the same syllabus, and question patterns are very similar.

5. What’s the NECO Mathematics exam structure?

• Paper 1: Objective (60 questions)

• Paper 2: Essay (theory and calculation-based)

6. Are graphs and constructions part of NECO Mathematics?

Yes. You must know how to draw graphs and basic constructions with ruler and compass.

7. Does NECO test statistics every year?

Almost every year. Be familiar with mean, median, mode, bar charts, and frequency tables.

8. What kind of objective questions come in NECO Maths?

Questions involving numbers, algebra, geometry, and applied word problems.

9. Is NECO Mathematics difficult?

Not if you practice consistently. Repetition and confidence are the keys.

10. When should I start preparing for NECO Mathematics?

At least 3 months before the exam. Solve questions every day.

✅ Conclusion

NECO Mathematics becomes simple when you focus on most repeated topics and master past questions. With the right preparation strategy, regular practice, and formula mastery, you can pass Mathematics with ease.