Deskripsi
Think deeply. Find structure. Write a proof.
Expanded edition. Mathematics Olympiad Bridge — Grade 7, Level 1. Build the number sense, case analysis and proof habits used in OSN SMP mathematics preparation.
120 distinct problems • 3 mixed-domain sets • hints for every problem • complete worked solutions • 121-page book
Rp50,000, one-time purchase. English edition only; each grade is sold separately.
YOUR THREE PDF DOWNLOADS
1. Problems — 65 pages: cover, learning route, two-page toolkit, all 120 questions, writing space and progress record.
2. Hints, Answers and Worked Solutions — 56 pages: problem-specific hints, complete reasoning, answers and source-calibration notes.
3. Combined — Problems and Solutions — 121 pages: the entire book in its original reading order.
Combined repeats the split content: 65 + 56 = 121 unique pages, not 242. Printed page numbers are retained so the problem codes and original book references remain consistent. This purchase includes Level 1 only.
WHAT YOU WILL PRACTISE
Divisibility and primes, factoring integer equations, parity, pigeonhole reasoning, constrained counting, similarity and area ratios. Each set includes ten questions in each of four domains: number theory, algebra, combinatorics and geometry. Set A explores structure; Set B works through cases and constraints; Set C connects ideas and asks for proofs. Compact previews show actual later challenges.
WHO IS IT FOR?
Learners comfortable with fractions, school algebra, factoring, triangle angles and area. Choose by readiness rather than school year alone. This is focused olympiad enrichment; a parent, tutor or teacher can help introduce unfamiliar tools.
HOW TO STUDY
Try four questions in a 30–45 minute session. Write the reasoning before checking a hint. Read the solution after a serious attempt, then retry without looking. Allow more time for substantial proofs and use the progress record to plan revisits. Print at actual size (100%) or read digitally.
Grades 7–8 build toward OSN SMP; Grade 9 begins the transition toward OSN SMA. These are early steps in a longer olympiad pathway toward goals such as IMO, not a complete IMO course or official contest publication. No competition result is guaranteed.
Digital PDFs available through Mayar after successful payment. No physical book. Bahasa Indonesia editions are available as separate products.