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CXC · CSEC · Additional Mathematics

Computation and Number Theory
Practice Questions

20 CXC CSEC Additional Mathematics questions on Computation and Number Theory, each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Computation and Number Theory.

Try 2 sample questions on Computation and Number Theory

Question 1 · 1 mark · Difficulty 1/3

Express 0.000 045 6 in standard form.

  1. 4.56 × 10⁻⁵
  2. 4.56 × 10⁻⁴
  3. 45.6 × 10⁻⁶
  4. 0.456 × 10⁻⁴
Show answer & explanation
✓ Answer: A4.56 × 10⁻⁵
56 × 10⁻⁵. Award 1 mark for moving decimal 5 places right to get a number between 1 and 10, giving 4.56 × 10⁻⁵. B is incorrect — this equals 0.000 456. C is incorrect — 45.6 is not between 1 and 10. D is incorrect — 0.456 is not between 1 and 10.
Question 2 · 1 mark · Difficulty 1/3

Which of the following numbers is a prime number?

  1. 51
  2. 57
  3. 59
  4. 63
Show answer & explanation
✓ Answer: C59
Award 1 mark for recognising that 59 has no factors other than 1 and itself. A is incorrect — 51 = 3 × 17. B is incorrect — 57 = 3 × 19. D is incorrect — 63 = 7 × 9.
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20 questions · 25 min · free

CXC CSEC Additional Mathematics: Computation and Number Theory FAQ

How many CXC CSEC Additional Mathematics questions on Computation and Number Theory are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Computation and Number Theory for CXC CSEC Additional Mathematics, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real CXC paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for CXC CSEC students preparing for Additional Mathematics?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Computation and Number Theory practice with other Additional Mathematics topics or even switch to a totally different CXC subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Computation and Number Theory questions aligned to the official CXC CSEC Additional Mathematics syllabus?
Every question is written against the published CXC CSEC Additional Mathematics specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CXC paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CXC.
How is Computation and Number Theory typically tested on CXC CSEC Additional Mathematics papers?
Computation and Number Theory appears across multiple question types on real CXC CSEC Additional Mathematics papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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