Primary 6 Math: Ratio Practice
Real Primary 6 Math questions on Ratio, 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.
Olibits is an independent learning platform and is not affiliated with or endorsed by the Ministry of Education. See our FAQ for the full breakdown.
Real Ratio practice questions
Express the ratio 12 : 18 in its simplest form.
2:3 ✓
12:18
2:4
3:2
Divide both parts by their highest common factor, 6: 12 ÷ 6 : 18 ÷ 6 = 2:3.
Express the ratio 15 : 20 in its simplest form.
4:3
15:20
3:5
3:4 ✓
Divide both parts by their highest common factor, 5: 15 ÷ 5 : 20 ÷ 5 = 3:4.
Express the ratio 21 : 28 in its simplest form.
21:28
3:5
4:3
3:4 ✓
Divide both parts by their highest common factor, 7: 21 ÷ 7 : 28 ÷ 7 = 3:4.
Express the ratio 20 : 45 in its simplest form.
4:9 ✓
20:45
4:10
9:4
Divide both parts by their highest common factor, 5: 20 ÷ 5 : 45 ÷ 5 = 4:9.