BBB 2025 Preliminary Exam Compilation

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by Giáo viên D

BBB Examination (Big Bay Bei International Mathematical Olympiad) is one of the international mathematics competitions organized by Olympiad Champion Education Centre (Hong Kong). It is part of a series of major contests including TIMO, HKIMO, FMO, and WIMO.

1. Structure of the BBB Preliminary Exam

  • Total questions: 20
  • Duration: 60 minutes
  • Question type: Multiple-choice
  • Language: Bilingual English – Vietnamese

Detailed structure:
The exam is divided into two parts, A and B, each consisting of 10 questions:

  • Part A: 10 basic questions, 4 points each, total 40 points.
  • Part B: 10 advanced questions, 6 points each, total 60 points.

Total score: 100 points.

2. Sample Exam for Grade 1

Access the exam here.

3. Sample Exam for Grade 2

Access the exam here.

4. Sample Exam for Grade 3

Access the exam here.

5. Sample Exam for Grade 4

Access the exam here.

6. Sample Exam for Grade 5

Access the exam here.

7. Study and Practice with CodeMath

At CodeMath, students will:

  • Practice BBB sample exams tailored to each grade.
  • Use the center’s online self-practice platform.
  • Learn fast and accurate problem-solving skills for international thinking exams.

Register for CodeMath’s training program today to prepare thoroughly for BBB 2025–2026 — a solid first step on your journey to conquering international mathematics!

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