Medium SOF International Mathematics Olympiad (IMO) · IMO Level 1 · . Sample The sum of the first five odd numbers is: A 15 B 20 C 25 D 30 Submit Answer Show Explanation Mark as Completed Mark as Important Mark for Review
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
Find the next term in the series: 2, 6, 12, 20, 30, ? SOF International Mathematics Olympiad (IMO) . Easy · Mathematics · 2026 See Explanation
How many factors does the number 36 have? SOF International Mathematics Olympiad (IMO) . Medium · Mathematics · 2026 See Explanation
Fill in the blank: The ratio of boys to girls in a class is 4 : 5. If the class has 36 students in all, the number of girls is ______. SOF International Mathematics Olympiad (IMO) . Medium · Mathematics · 2026 See Explanation
Two fair dice are thrown together. What is the probability that the sum of the numbers on the top faces is 8? SOF International Mathematics Olympiad (IMO) . Medium · Mathematics · 2026 See Explanation