Summary

• Description:

  The MS Word document comprises Navakholo Sub-County Joint Mock 1 Mathematics Alt. A Paper 1 March 2026 Pre-Mock Exam with Marking Scheme. The PDF version is also available upon your request. The marking scheme is in a different document.

  It was a KCSE Mathematics Alternative A Paper 1 examination. This paper evaluates Form 4 candidates' mastery of core mathematical concepts including number work, algebra, geometry, and mensuration — skills that form the foundation of quantitative reasoning at secondary level.

  • Month Administered: March 2026
  • Duration: 2½ hours
  • Total Marks: 100
  • Number of Questions: 24 (Questions 1–16 in Section I, all compulsory; Questions 17–24 in Section II, answer any five)
  • Structure:
    • Section I – 50 marks (16 compulsory short-answer questions)
    • Section II – 50 marks (8 questions; answer any five, 10 marks each)

  It covers the following topics:

  • Section I:
    • Integers and order of operations (BODMAS)
    • Indices and exponential equations
    • Inequalities and integral values
    • Decimals and fractions conversion
    • Algebraic simplification of expressions involving difference of two squares
    • Similar figures — surface area using volume scale factor
    • Geometrical constructions — parallelogram and perpendicular from a point
    • Volume and water level rise — cylinder and sphere
    • Interior and exterior angles of regular polygons
    • Currency exchange — US dollars, Kenya Shillings, and Japanese Yen
    • Sketching 3D prisms
    • Trigonometry — exact values using sin, tan, and complementary angles
    • Transformations — quarter turn (negative rotation) on a Cartesian plane
    • GCD application — group formation from boys, girls, and teachers
    • Age problems — simultaneous equations
    • Reciprocal tables — evaluating expressions
  • Section II:
    • Ratio and fractions — oranges in boxes (proportion and percentages)
    • Statistics — frequency distribution tables, modal class, mean, histogram, and frequency polygon
    • Mensuration — surface area, painting cost, and capacity of a composite solid (cylinder + hemisphere)
    • Trigonometry and surveying — field PQRS, angles, area, shortest distance, and angle of elevation
    • Scale drawing and bearings — positions of three aircraft after 20 minutes
    • Velocity–time graphs and distance–time graphs — particle motion and Wanyama's journey
    • Coordinate geometry — equations of lines L1, L2, L3, L4 and point of intersection
    • Quadratic equations in context — water project contributions, initial members, and percentage increase
• Category:

  Mock Past Papers
• Level:

  Form 4
• Subject:

  MATHEMATICS

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