The Civil Defence, Correctional, Fire and Immigration Services Board (CDCFIB) recruitment process remains one of Nigeria’s most competitive paramilitary selections. Each year, thousands of applicants take the Computer-Based Test (CBT) for a chance to join the Civil Defence, Immigration, Fire Service, or Correctional Service.

If you want to stand out in the upcoming recruitment exam, you need proper preparation, and that begins with the updated CDCFIB CBT Past Questions and Answers PDF (2025 edition).

Summary

Download the CDCFIB CBT Past Questions & Answers (2025 PDF) to prepare for the upcoming Civil Defence, Immigration, Fire Service, and Correctional Service recruitment exams. The material covers English, Mathematics, General Knowledge, and Logical Reasoning, the same topics tested in the official CBT.

What Is the CDCFIB CBT Test?

The CDCFIB CBT is an online aptitude test conducted for applicants seeking positions within Nigeria’s major paramilitary agencies.

The test evaluates each candidate’s:

• Cognitive ability (reasoning and logic)

• Communication skills (English and comprehension)

• Numerical accuracy (basic mathematics)

• Awareness of current affairs and national security issues

In the 2025 recruitment exercise, the CBT will be fully online, starting Wednesday, November 12, 2025, through the official portal:
👉 https://recruitment.cdcfib.gov.ng

CDCFIB Exam Format: What to Expect

The CDCFIB CBT typically consists of multiple-choice questions (MCQs) divided into sections:

Total: 70 questions (average time: 45 minutes).

Each question carries equal marks, and wrong answers may reduce your total score depending on the marking format used.

Below is a comprehensive set of 200 CDCFIB CBT Past Questions & Answers, grouped into four sections (50 per subject):

• English Language

• Mathematics

• General Knowledge

• Logical Reasoning

They are written in CBT format for Civil Defence, Immigration, Fire Service, and Correctional Service recruitment tests.

ENGLISH LANGUAGE (50 QUESTIONS & ANSWERS)

1. Choose the correct synonym for “benevolent”:
   A) Kind B) Cruel C) Proud D) Lazy
   Answer: A) Kind

2. The antonym of “generous” is:
   A) Mean B) Kind C) Wealthy D) Cheerful
   
   Answer: A) Mean

3. Which word is correctly spelled?
   A) Accomodate B) Acommodate C) Accommodate D) Acomodate
   
   Answer: C) Accommodate

4. Choose the correct sentence:
   A) He go to work every day.
   B) He goes to work every day.
   Answer: B) He goes to work every day.

5. “Neither of the students ___ absent.”
   A) were B) are C) is D) be
   
   Answer: C) is

6. The plural of “ox” is:
   A) Oxens B) Oxes C) Oxen D) Oxs
   
   Answer: C) Oxen

7. Fill in the blank: “The teacher insisted ___ obedience.”
   
   A) in B) on C) of D) at
   Answer: B) on

8. Which of these is a proverb?
   A) Honesty is the best policy.
   B) She is tall.
   
   Answer: A) Honesty is the best policy.

9. Choose the correct preposition: “He congratulated me ___ my success.”
   A) on B) for C) about D) with
   Answer: A) on

10. “She sings beautifully.” — Identify the adverb.
    Answer: Beautifully

11. “A stitch in time saves nine” means:
    Answer: Acting promptly prevents bigger problems.

12. Change to passive: “They built the bridge.”
    Answer: The bridge was built by them.

13. Choose the right article: “He is ___ honest man.”
    Answer: an

14. “Many are called but few are chosen.” The underlined is:
    Answer: A clause

15. “His bark is worse than his bite” means:
    Answer: He seems harsh but is not dangerous.

16. “She spoke in parables” means she spoke:
    Answer: Indirectly

17. “To hit the nail on the head” means:
    Answer: To be exactly right.

18. “He works like a horse.” — The figure of speech is:
    Answer: Simile

19. The antonym of “expand” is:
    Answer: Contract

20. Which sentence is correct?
    A) He is junior than me.
    B) He is junior to me.
    Answer: B) He is junior to me.

21. “Each of the boys ___ done his work.”
    Answer: has

22. Identify the noun: “Wisdom is better than riches.”
    Answer: Wisdom

23. “She gave me a bunch of flowers.” — The collective noun is:
    Answer: Bunch

24. What is the plural of “radius”?
    Answer: Radii

25. “She was beside herself with joy” means:
    Answer: Extremely happy

26. “The baby cried all night.” — Identify the tense.
    Answer: Simple past

27. Which word means “fear of height”?
    Answer: Acrophobia

28. “He told me the news.” — The object is:
    Answer: me

29. “Who is knocking at the door?” — Identify the subject.
    Answer: Who

30. “He arrived ___ the morning.”
    Answer: in

31. “She depends ___ her mother.”
    Answer: on

32. “He did it by himself.” — “by himself” is a:
    Answer: Reflexive pronoun

33. “The man ___ house was burnt is rich.”
    Answer: whose

34. The opposite of “temporary” is:
    Answer: Permanent

35. “To go the extra mile” means:
    Answer: To make extra effort

36. The synonym of “permit” is:
    Answer: Allow

37. “The boys themselves cleaned the hall.” — “themselves” is:
    Answer: Emphatic pronoun

38. “He has been working since morning.” — Identify the tense.
    Answer: Present perfect continuous

39. The antonym of “success” is:
    Answer: Failure

40. “He is as brave as a lion.” — The figure of speech is:
    Answer: Simile

41. The comparative form of “good” is:
    Answer: Better

42. “He is fond ___ music.”
    Answer: of

43. “She looks forward ___ meeting you.”
    Answer: to

44. “The book was written ___ Shakespeare.”
    Answer: by

45. “I prefer tea ___ coffee.”
    Answer: to

46. “He spoke loudly.” — Identify the part of speech of “loudly.”
    Answer: Adverb

47. “She is very intelligent, isn’t she?” — Identify the question tag.
    Answer: isn’t she

48. The plural of “datum” is:
    Answer: Data

49. The antonym of “ancient” is:
    Answer: Modern

50. “She went out ___ the rain.”
    Answer: in

MATHEMATICS CDCFIB CBT QUESTIONS & ANSWERS)

1. 5 + 7 × 2 = ?
   Answer: 19

2. Simplify: 24 ÷ 6 × 3 = ?
   Answer: 12

3. 25% of 200 = ?
   Answer: 50

4. Convert 0.25 to a fraction.
   Answer: 1/4

5. Find the average of 5, 10, and 15.
   Answer: 10

6. What is the square root of 144?
   Answer: 12

7. Express ¾ as a percentage.
   Answer: 75%

8. 2³ = ?
   Answer: 8

9. If x = 3, find the value of 2x + 4.
   Answer: 10

10. 100 ÷ 4 × 2 = ?
    Answer: 50

11. Simplify: (3 + 5) × 2
    Answer: 16

12. Find the perimeter of a rectangle (L=6, B=4).
    Answer: 20

13. The area of a triangle = ½ × base × height. If base=10, height=8.
    Answer: 40

14. Convert 2.5 hours to minutes.
    Answer: 150 minutes

15. Find the missing number: 8, 16, 24, __, 40.
    Answer: 32

16. What is ⅔ of 120?
    Answer: 80

17. Simplify: 45 ÷ 9 + 3 = ?
    Answer: 8

18. The sum of angles in a triangle is:
    Answer: 180°

19. Find x if 3x = 15.
    Answer: 5

20. The perimeter of a square with side 6 cm is:
    Answer: 24 cm

21. 12 × 12 = ?
    Answer: 144

22. 15% of 400 = ?
    Answer: 60

23. 0.6 × 100 = ?
    Answer: 60

24. The mean of 4, 8, 12, 16 is:
    Answer: 10

25. The opposite of addition is:
    Answer: Subtraction

26. Find the simple interest on ₦5000 at 10% for 2 years.
    Answer: ₦1000

27. Convert 3/5 to decimal.
    Answer: 0.6

28. Find ¾ of ₦1200.
    Answer: ₦900

29. 1 km = ? m
    Answer: 1000 m

30. 1 litre = ? ml
    Answer: 1000 ml

31. Simplify: 2(4 + 5)
    Answer: 18

32. 9² = ?
    Answer: 81

33. 100 – (25 + 15) = ?
    Answer: 60

34. The product of 8 and 7 is:
    Answer: 56

35. A dozen equals:
    Answer: 12

36. ⅕ of 50 = ?
    Answer: 10

37. The ratio of 2 to 8 is:
    Answer: 1:4

38. Simplify: 10 + 4 × 3
    Answer: 22

39. Find the difference between 150 and 85.
    Answer: 65

40. If a = 5, b = 2, find a² + b².
    Answer: 29

41. A car travels 120 km in 2 hours. Find its speed.
    Answer: 60 km/h

42. Find the sum of 1 + 3 + 5 + 7 + 9.
    Answer: 25

43. What is the value of 10% of 5000?
    Answer: 500

44. 8 × (2 + 3) = ?
    Answer: 40

45. Convert 2/10 to percentage.
    Answer: 20%

46. The cube root of 27 = ?
    Answer: 3

47. ¾ × 200 = ?
    Answer: 150

48. 2² + 3² = ?
    Answer: 13

49. The area of a square with side 5 cm = ?
    Answer: 25 cm²

50. The perimeter of a rectangle 8 by 4 = ?
    Answer: 24

GENERAL KNOWLEDGE CDCFIB CBT 50 QUESTIONS & ANSWERS

1. Who is Nigeria’s current President?
   Answer: (Update with current year’s name)

2. What is Nigeria’s capital city?
   Answer: Abuja

3. When did Nigeria gain independence?
   Answer: 1960

4. The currency of Nigeria is:
   Answer: Naira

5. NSCDC stands for:
   Answer: Nigeria Security and Civil Defence Corps

6. What is the motto of the Nigerian Police Force?
   Answer: The Police is Your Friend

7. Who formed the first political party in Nigeria?
   Answer: Herbert Macaulay

8. How many states are in Nigeria?
   Answer: 36

9. Who discovered River Niger?
   Answer: Mungo Park

10. Which agency handles fire emergencies?
    Answer: Federal Fire Service

11. Who is the current Commandant General of the NSCDC?
    Answer: (Update with current name for 2025)

12. What year was the Nigeria Immigration Service established?
    Answer: 1963

13. The Green on the Nigerian flag represents:
    Answer: Agriculture

14. The white color on the Nigerian flag represents:
    Answer: Peace and unity

15. Nigeria is located in which continent?
    Answer: Africa

16. How many geopolitical zones are in Nigeria?
    Answer: Six

17. Who was Nigeria’s first Prime Minister?
    Answer: Sir Abubakar Tafawa Balewa

18. Who was Nigeria’s first President?
    Answer: Dr. Nnamdi Azikiwe

19. The legislative arm of government in Nigeria is called:
    Answer: National Assembly

20. The Nigerian National Assembly consists of:
    Answer: Senate and House of Representatives

21. What does INEC stand for?
    Answer: Independent National Electoral Commission

22. What year was the current Nigerian Constitution enacted?
    Answer: 1999

23. The largest river in Nigeria is:
    Answer: River Niger

24. Nigeria shares borders with how many countries?
    Answer: Four (Benin, Niger, Chad, Cameroon)

25. Who discovered electricity?
    Answer: Benjamin Franklin

26. The first Nigerian woman to become a Minister is:
    Answer: Chief (Mrs.) Margaret Ekpo

27. What is the full meaning of EFCC?
    Answer: Economic and Financial Crimes Commission

28. The Central Bank of Nigeria was established in:
    Answer: 1958

29. Which Nigerian city is known as the “Coal City”?
    Answer: Enugu

30. The acronym “FRSC” stands for:
    Answer: Federal Road Safety Corps

31. Who is regarded as the father of Nigerian nationalism?
    Answer: Herbert Macaulay

32. How many local government areas are in Nigeria?
    Answer: 774

33. The current Inspector-General of Police is:
    Answer: (Update annually)

34. The body responsible for fighting corruption in Nigeria is:
    Answer: EFCC

35. The headquarters of ECOWAS is located in:
    Answer: Abuja

36. The first executive President of Nigeria was:
    Answer: Alhaji Shehu Shagari

37. The first Nigerian Military Head of State was:
    Answer: Major General J.T.U. Aguiyi-Ironsi

38. The official language of Nigeria is:
    Answer: English

39. The first university in Nigeria is:
    Answer: University of Ibadan

40. The Nigerian Coat of Arms has how many horses?
    Answer: Two

41. What does the black shield on the Coat of Arms represent?
    Answer: Nigeria’s fertile soil

42. The national flower of Nigeria is:
    Answer: Costus Spectabilis

43. Who composed the Nigerian National Anthem?
    Answer: Pa Benedict Odiase

44. What is Nigeria’s national pledge about?
    Answer: Loyalty and service to the nation

45. The largest ethnic group in Nigeria is:
    Answer: Hausa-Fulani

46. The major source of Nigeria’s revenue before oil was:
    Answer: Agriculture

47. The acronym NAFDAC means:
    Answer: National Agency for Food and Drug Administration and Control

48. The longest bridge in West Africa is located in Nigeria. What is its name?
    Answer: Third Mainland Bridge

49. The Nigerian Defence Academy (NDA) is located in which state?
    Answer: Kaduna State

50. Nigeria operates what type of government system?
    Answer: Federal system of government

LOGICAL REASONING CDCFIB CBT 50 QUESTIONS & ANSWERS

1. If all dogs are animals, and all animals have four legs, then all dogs have:
   Answer: Four legs

2. Find the next number in the series: 2, 4, 8, 16, __
   Answer: 32

3. Which number is odd in the sequence: 5, 10, 15, 25, 30?
   Answer: 25

4. If five pencils cost ₦50, how much will 10 pencils cost?
   Answer: ₦100

5. A man is twice as old as his son. If the son is 12, how old is the man?
   Answer: 24

6. What comes next: Monday, Wednesday, Friday, __?
   Answer: Sunday

7. All squares are rectangles, but not all rectangles are squares. True or False?
   Answer: True

8. A clock shows 3:15. What is the angle between the hour and minute hands?
   Answer: 7.5°

9. If CAT = 3120, then DOG = ?
   Answer: 4157 (based on alphabetical coding)

10. Which number completes the pattern: 7, 14, 21, 28, __?
    Answer: 35

11. If 6 men can dig a pit in 9 days, how many days will 3 men take?
    Answer: 18

12. The opposite of north-east is:
    Answer: South-west

13. A is older than B, and B is older than C. Who is the youngest?
    Answer: C

14. If you reverse 125, what number do you get?
    Answer: 521

15. Find the odd one out: Mango, Banana, Yam, Orange.
    Answer: Yam

16. 1, 4, 9, 16, __
    Answer: 25

17. If 2 + 3 = 10, 8 + 4 = 96, then 6 + 5 = ?
    Answer: 66

18. Which is heavier: 1 kg of cotton or 1 kg of iron?
    Answer: Equal weight

19. If a hen lays an egg every day, how many eggs in two weeks?
    Answer: 14

20. A farmer has 17 goats. All but 8 die. How many remain?
    Answer: 8

21. Which comes next: Z, Y, X, __
    Answer: W

22. If ALL = 36, what is BALL = ?
    Answer: 54

23. 3, 6, 12, 24, __
    Answer: 48

24. If you rearrange the letters “LISTEN”, you get:
    Answer: SILENT

25. If you buy 3 apples for ₦60, how much for 12 apples?
    Answer: ₦240

26. The next number after 11, 13, 17, 19, 23 is:
    Answer: 29

27. If TALL is opposite of SHORT, what is opposite of WIDE?
    Answer: Narrow

28. If you face east and turn 270°, which direction are you facing?
    Answer: North

29. Which is the odd one out: Cat, Dog, Cow, Chair.
    Answer: Chair

30. 15, 30, 45, 60, __
    Answer: 75

31. If the first two statements are true, is the third true?
    “All men are mortal. Socrates is a man. Therefore, Socrates is mortal.”
    Answer: True

32. A cube has how many faces?
    Answer: 6

33. Which is next in the pattern: A, C, F, J, O, __?
    Answer: U

34. A dozen eggs is 12. How many eggs in 2½ dozen?
    Answer: 30

35. If you add 20% to ₦500, what is the total?
    Answer: ₦600

36. Which number is the median: 2, 5, 7, 9, 12?
    Answer: 7

37. What comes next in the pattern: 5, 10, 20, 40, __?
    Answer: 80

38. The opposite of “Possible” is:
    Answer: Impossible

39. 10 men can complete a job in 6 days. How long for 5 men?
    Answer: 12 days

40. If one bottle costs ₦120, how much will 4 cost?
    Answer: ₦480

41. How many sides has a hexagon?
    Answer: 6

42. The acronym “AI” stands for:
    Answer: Artificial Intelligence

43. 1, 2, 3, 5, 8, 13, 21, __
    Answer: 34

44. What is 15% of ₦2000?
    Answer: ₦300

45. If today is Thursday, what day will it be in 5 days?
    Answer: Tuesday

46. Which is different: Square, Triangle, Circle, Cube?
    Answer: Cube

47. 4 children share ₦120 equally. How much each?
    Answer: ₦30

48. Find the missing number: 100, 90, 80, __, 60.
    Answer: 70

49. Which number is half of 50% of 200?
    Answer: 50

50. The next in the series: 1, 4, 9, 16, 25, __
    Answer: 36