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Number
Practice Questions

40 CIE IGCSE Mathematics questions on Number, 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 Number.

Try 2 sample questions on Number

Question 1 · 1 mark · Difficulty 1/3

Which of the following is the correct definition of a rational number?

  1. A number that is always a positive integer
  2. A number that cannot be expressed as a fraction
  3. A number that has an infinite non-repeating decimal expansion
  4. A number that can be written as p/q where p and q are integers and q ≠ 0
Show answer & explanation
✓ Answer: D — A number that can be written as p/q where p and q are integers and q ≠ 0
A rational number is defined as any number expressible in the form p/q where p and q are integers and q ≠ 0. Option A describes irrational numbers. Option C describes irrational numbers such as π or √2. Option D is far too restrictive, excluding negatives and fractions.
Question 2 · 1 mark · Difficulty 1/3

Express 0.00347 in standard form.

  1. 34.7 × 10⁻⁴
  2. 0.347 × 10⁻²
  3. 3.47 × 10⁻³
  4. 3.47 × 10⁻²
Show answer & explanation
✓ Answer: C — 3.47 × 10⁻³
To write 0.00347 in standard form, move the decimal point 3 places to the right to get 3.47, giving 3.47 × 10⁻³. Option A uses the wrong power (10⁻² corresponds to moving only 2 places). Option B has A = 34.7 which is outside the required range 1 ≤ A < 10. Option D has A = 0.347 which is also outside the required range.
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20 questions · 25 min · free

CIE IGCSE Mathematics: Number FAQ

How many CIE IGCSE Mathematics questions on Number are there on Kramizo?
Kramizo currently has 40 exam-board-aligned practice questions on Number for CIE IGCSE 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 CIE 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 CIE IGCSE students preparing for 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 Number practice with other Mathematics topics or even switch to a totally different CIE 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 Number questions aligned to the official CIE IGCSE Mathematics syllabus?
Every question is written against the published CIE IGCSE Mathematics specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CIE 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 CIE.
How is Number typically tested on CIE IGCSE Mathematics papers?
Number appears across multiple question types on real CIE IGCSE 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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