JAMB CBT PRACTICE TEST

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BIOLOGY LESSON NOTE ON HUMAN KIDNEY

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Lesson Note on the Human Kidney Topic: The Human Kidney Duration: 40 minutes Specific Objectives: By the end of the lesson, students should be able to: Define the kidney and state its location in the human body. Identify and describe the structure and functions of the kidney. Explain the processes involved in urine formation (filtration, reabsorption, and secretion). Describe how the kidney contributes to homeostasis. Identify common kidney-related diseases and how to prevent them. Evaluate the importance of maintaining kidney health. Lesson Content: 1. Introduction to the Human Kidney The kidneys are vital organs in the human body responsible for filtering waste from the blood and regulating water and electrolyte balance. They are part of the excretory system and play a crucial role in homeostasis. Location: The kidneys are located in the abdominal cavity, on either side of the spine, just below the rib cage. Each kidney is bean-shaped and about the size of a fi...
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WAEC Mathematics Past Questions and Answers

 

Introduction

Mathematics is a core subject in WAEC examinations that develops logical thinking, problem-solving skills, and numerical ability. It covers topics such as algebra, geometry, trigonometry, statistics, and arithmetic. Success in Mathematics depends on consistent practice and understanding of formulas and methods. This post provides 100 WAEC-standard objective questions and answers to help students prepare effectively.

OBJECTIVE QUESTIONS (1–100)

Instruction: Choose the correct option A–D.

1–20: Number & Basic Operations

  1. Simplify: 12 + 8 ÷ 2
    A. 10 B. 16 C. 20 D. 24
    Answer: B

  2. The place value of 5 in 5,432 is
    A. 5 B. 50 C. 500 D. 5000
    Answer: D

  3. 25% of 200 is
    A. 25 B. 50 C. 75 D. 100
    Answer: B

  4. The square root of 144 is
    A. 10 B. 11 C. 12 D. 13
    Answer: C

  5. 3² × 2³ =
    A. 36 B. 72 C. 18 D. 24
    Answer: B

  6. The HCF of 12 and 18 is
    A. 3 B. 6 C. 9 D. 12
    Answer: B

  7. The LCM of 4 and 6 is
    A. 10 B. 12 C. 14 D. 24
    Answer: B

  8. 0.25 as a fraction is
    A. 1/2 B. 1/3 C. 1/4 D. 1/5
    Answer: C

  9. 3/5 as a decimal is
    A. 0.3 B. 0.5 C. 0.6 D. 0.8
    Answer: C

  10. The reciprocal of 2 is
    A. 1/2 B. 2 C. -2 D. 0
    Answer: A

  11. Simplify: 15 - 3 × 2
    A. 24 B. 9 C. 12 D. 18
    Answer: B

  12. The next number in 2, 4, 6, 8 is
    A. 9 B. 10 C. 11 D. 12
    Answer: B

  13. The sum of angles in a triangle is
    A. 90° B. 180° C. 360° D. 270°
    Answer: B

  14. A right angle is
    A. 45° B. 90° C. 180° D. 360°
    Answer: B

  15. An acute angle is less than
    A. 90° B. 180° C. 360° D. 0°
    Answer: A

  16. A straight line angle is
    A. 90° B. 180° C. 360° D. 270°
    Answer: B

  17. 1 km =
    A. 100 m B. 1000 m C. 10 m D. 10,000 m
    Answer: B

  18. 1 hour =
    A. 30 min B. 60 min C. 90 min D. 100 min
    Answer: B

  19. 1 litre =
    A. 10 ml B. 100 ml C. 1000 ml D. 500 ml
    Answer: C

  20. The square of 9 is
    A. 18 B. 27 C. 81 D. 72
    Answer: C

21–40: Algebra

  1. Solve: x + 5 = 12
    A. 5 B. 6 C. 7 D. 8
    Answer: C

  2. If x = 3, then 2x + 4 =
    A. 8 B. 10 C. 12 D. 14
    Answer: B

  3. Simplify: 3x + 2x
    A. 5x B. 6x C. 3x² D. x
    Answer: A

  4. Factorize: x² - 9
    A. (x-3)(x+3) B. (x-9)(x+1) C. (x+9)(x-1) D. (x-3)²
    Answer: A

  5. Solve: 2x = 10
    A. 2 B. 5 C. 10 D. 20
    Answer: B

  6. If x = 4, x² =
    A. 8 B. 12 C. 16 D. 20
    Answer: C

  7. Simplify: 5x - 2x
    A. 7x B. 3x C. 2x D. x
    Answer: B

  8. Solve: x - 7 = 0
    A. 7 B. -7 C. 0 D. 14
    Answer: A

  9. Expand: (x + 2)(x + 3)
    A. x² + 5x + 6 B. x² + 6 C. x² + x + 6 D. x² + 5
    Answer: A

  10. If y = 2x and x = 5, y =
    A. 5 B. 10 C. 15 D. 20
    Answer: B

  11. Solve: 3x = 15
    A. 3 B. 5 C. 10 D. 15
    Answer: B

  12. Simplify: 4x + 3x
    A. 7x B. 12x C. x D. 1x
    Answer: A

  13. If x = 2, 3x + 1 =
    A. 5 B. 6 C. 7 D. 8
    Answer: C

  14. Solve: x/2 = 6
    A. 3 B. 6 C. 12 D. 18
    Answer: C

  15. Factorize: x² + 5x
    A. x(x+5) B. (x+5)² C. x²(x+5) D. x+5
    Answer: A

  16. If x = 1, 2x² =
    A. 1 B. 2 C. 3 D. 4
    Answer: B

  17. Simplify: 10x - 4x
    A. 14x B. 6x C. 4x D. 2x
    Answer: B

  18. Solve: x + 9 = 20
    A. 9 B. 10 C. 11 D. 12
    Answer: C

  19. If x = 6, x² - x =
    A. 30 B. 36 C. 42 D. 12
    Answer: A

  20. Expand: (x + 1)²
    A. x² + 2x + 1 B. x² + 1 C. x² - 1 D. x² + x
    Answer: A

41–60: Geometry & Mensuration

  1. Area of rectangle =
    A. l + w B. l × w C. l ÷ w D. 2(l+w)
    Answer: B

  2. Perimeter of square =
    A. 2l B. 3l C. 4l D. l²
    Answer: C

  3. Area of triangle =
    A. 1/2 bh B. bh C. l × w D. πr²
    Answer: A

  4. Circumference of circle =
    A. πr² B. 2πr C. πd² D. r²
    Answer: B

  5. Area of circle =
    A. πr² B. 2πr C. πd D. r
    Answer: A

  6. Volume of cube =
    A. l² B. l³ C. 2l D. 3l
    Answer: B

  7. A right angle triangle has
    A. 2 equal sides B. 1 right angle C. no angle D. 360°
    Answer: B

  8. Pythagoras theorem applies to
    A. all triangles B. right triangles C. circles D. squares
    Answer: B

  9. Hypotenuse is the
    A. shortest side B. longest side C. base only D. height
    Answer: B

  10. A rectangle has
    A. equal sides B. opposite equal sides C. no sides D. curved sides
    Answer: B

61–80: Statistics & Probability

  1. Mean is
    A. sum ÷ number of values B. product C. difference D. square
    Answer: A

  2. Mode is
    A. middle value B. most frequent value C. average D. smallest value
    Answer: B

  3. Median is
    A. middle value B. sum C. product D. range
    Answer: A

  4. Range is
    A. highest - lowest B. sum C. average D. product
    Answer: A

  5. Probability ranges from
    A. 0–1 B. 0–10 C. 1–100 D. -1–1
    Answer: A

  6. Probability of sure event is
    A. 0 B. 1 C. 2 D. -1
    Answer: B

  7. A die has
    A. 4 faces B. 6 faces C. 8 faces D. 10 faces
    Answer: B

  8. Coin has
    A. 1 side B. 2 sides C. 3 sides D. 4 sides
    Answer: B

  9. Average of 2, 4, 6 is
    A. 4 B. 5 C. 6 D. 3
    Answer: A

  10. Frequency means
    A. repetition B. sum C. product D. difference
    Answer: A

81–100: Trigonometry & Advanced Topics

  1. sin 90° =
    A. 0 B. 1 C. -1 D. 2
    Answer: B

  2. cos 0° =
    A. 0 B. 1 C. -1 D. 2
    Answer: B

  3. tan 45° =
    A. 0 B. 1 C. 2 D. -1
    Answer: B

  4. sin 0° =
    A. 0 B. 1 C. -1 D. 2
    Answer: A

  5. cos 90° =
    A. 1 B. 0 C. -1 D. 2
    Answer: B

  6. Angle sum in triangle =
    A. 90° B. 180° C. 360° D. 270°
    Answer: B

  7. Supplementary angles sum to
    A. 90° B. 180° C. 360° D. 270°
    Answer: B

  8. Complementary angles sum to
    A. 90° B. 180° C. 360° D. 270°
    Answer: A

  9. A straight line is
    A. 90° B. 180° C. 360° D. 45°
    Answer: B

  10. A full circle is
    A. 90° B. 180° C. 270° D. 360°
    Answer: D

  11. Speed =
    A. distance/time B. force/mass C. work/time D. mass/volume
    Answer: A

  12. 1/2 of 100 =
    A. 20 B. 25 C. 50 D. 75
    Answer: C

  13. 10% of 200 =
    A. 10 B. 20 C. 30 D. 40
    Answer: B

  14. 1/4 of 80 =
    A. 10 B. 15 C. 20 D. 25
    Answer: C

  15. 3 + 4 × 2 =
    A. 14 B. 11 C. 16 D. 10
    Answer: B

  16. 5² =
    A. 10 B. 15 C. 20 D. 25
    Answer: D

  17. 6 × 6 =
    A. 12 B. 30 C. 36 D. 42
    Answer: C

  18. 100 ÷ 4 =
    A. 20 B. 25 C. 30 D. 40
    Answer: B

  19. 7 + 8 =
    A. 13 B. 14 C. 15 D. 16
    Answer: C

  20. 9 - 3 =
    A. 5 B. 6 C. 7 D. 8
    Answer: B

  21. 2³ =
    A. 4 B. 6 C. 8 D. 10
    Answer: C

  22. 10² =
    A. 10 B. 100 C. 1000 D. 20
    Answer: B

  23. √49 =
    A. 5 B. 6 C. 7 D. 8
    Answer: C

  24. √64 =
    A. 6 B. 7 C. 8 D. 9
    Answer: C

  25. 1 + 1 =
    A. 1 B. 2 C. 3 D. 4
    Answer: B

  26. 2 + 2 =
    A. 2 B. 3 C. 4 D. 5
    Answer: C

  27. 3 + 3 =
    A. 5 B. 6 C. 7 D. 8
    Answer: B

  28. 4 + 4 =
    A. 6 B. 7 C. 8 D. 9
    Answer: C

  29. 5 + 5 =
    A. 9 B. 10 C. 11 D. 12
    Answer: B

  30. Mathematics is the study of
    A. living things B. numbers and logic C. history D. chemistry
    Answer: B

EXAM SUCCESS TIPS

  • Master formulas and practice them daily
  • Focus on algebra and word problems
  • Learn geometry rules and theorems
  • Practice speed and accuracy
  • Solve past WAEC questions regularly
  • Understand steps, don’t just memorize answers
  • Practice CBT-style exams
  • Revise weak topics repeatedly
  • Always show working steps
  • Stay consistent with daily practice

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