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Mensuration questions test the right formula and the right units: centimetres for lengths, square centimetres for areas and cubic centimetres for volumes. With π = 22/7, choose radii in the 7 table and cancel the 7 first. When every length grows k times, areas grow k × k times and volumes k × k × k times.
✓ You passed this topic’s test.
Divide by 7 first — “with π = 22/7 and a radius in the 7 table, cancel the 7 before multiplying”
Use it for: Circle, cube, cuboid, tank and scaling questions in Class 7–10 Olympiad papers and mensuration chapters.
Check: 616 × 7 = 4312 and 22 × 14 × 14 = 4312 ✓
Work it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the ⭕ Circle Champion badge when you pass — and a certificate when you finish all 13 topics of Part 4 · Class 5–10 problem solving. You can still take the test without signing in.
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