Olibits / Math / Ratio (Advanced)
Primary 6 Math: Ratio (Advanced) Practice
Real Primary 6 Math questions on Ratio (Advanced), pulled directly from the Olibits question bank — the same questions a child would actually see, not separately written for this page.
MOE strand: Number and Algebra
Curriculum alignment
Mathematics Syllabus, Primary One to Six (MOE, 2021 syllabus)
Taught across P1–P6.
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Real Ratio (Advanced) practice questions
If A : B = 2 : 3 and B : C = 4 : 5, what is A : B : C in its simplest form?
15 : 12 : 8
8 : 12 : 15 ✓
6 : 9 : 20
2 : 3 : 5
Scale both ratios so B matches: A : B = 8 : 12 and B : C = 12 : 15, giving A : B : C = 8 : 12 : 15, which simplifies to 8 : 12 : 15.
If A : B = 3 : 4 and B : C = 5 : 2, what is A : B : C in its simplest form?
15 : 20 : 8 ✓
12 : 16 : 10
8 : 20 : 15
3 : 4 : 2
Scale both ratios so B matches: A : B = 15 : 20 and B : C = 20 : 8, giving A : B : C = 15 : 20 : 8, which simplifies to 15 : 20 : 8.
If A : B = 5 : 3 and B : C = 2 : 7, what is A : B : C in its simplest form?
10 : 6 : 21 ✓
15 : 9 : 14
21 : 6 : 10
5 : 3 : 7
Scale both ratios so B matches: A : B = 10 : 6 and B : C = 6 : 21, giving A : B : C = 10 : 6 : 21, which simplifies to 10 : 6 : 21.
If A : B = 4 : 5 and B : C = 3 : 2, what is A : B : C in its simplest form?
4 : 5 : 2
20 : 25 : 6
12 : 15 : 10 ✓
10 : 15 : 12
Scale both ratios so B matches: A : B = 12 : 15 and B : C = 15 : 10, giving A : B : C = 12 : 15 : 10, which simplifies to 12 : 15 : 10.