Medium SOF International Mathematics Olympiad (IMO) · IMO Level 1 · 2017 . Sample Using π = 22/7, what is the circumference of a circle of radius 7 cm? A 44 B 66 C 22 D 22 Submit Answer Show Explanation Mark as Completed Mark as Important Mark for Review
Which of the following fractions is the greatest: 5/6, 7/9, 3/4, 11/12? SOF International Mathematics Olympiad (IMO) . Easy · Mathematics · 2026 See Explanation
A train 150 m long passes a telegraph pole in 15 seconds. Find the speed of the train in km/h. SOF International Mathematics Olympiad (IMO) . Medium · Mathematics · 2026 See Explanation
The average of 5 numbers is 18. If one of the numbers, 12, is removed, what is the average of the remaining numbers? SOF International Mathematics Olympiad (IMO) . Medium · Mathematics · 2026 See Explanation
Evaluate: (0.3 × 0.4) ÷ 0.02 SOF International Mathematics Olympiad (IMO) . Medium · Mathematics · 2026 See Explanation
If a : b = 2 : 3 and b : c = 4 : 5, then a : c is equal to: SOF International Mathematics Olympiad (IMO) . Hard · Mathematics · 2026 See Explanation