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This is a demo of Math Olympiad 2. Your next practice questions in a specific program will be specially tailored for you as the system learns from your previous practices!
1. Please find the missing number in 485, 483, 481, ?, 477, 475, 473, ... 2. Each face of a cube has a unique color. Below shows some of the faces of the cube. What is the possible color of the face that is opposite to the face with (blue) color?
3. Observe the following equivalence relationships. How many baseballs are equivalent to one soccer ball? 4. There were 15 books in a bookshelf originally. After half of the storybooks were borrowed by students, 9 books were left in the shelf. How many storybooks were there originally? 5. How many cuts are needed to cut a long log into 19 shorter pieces? 6. Last year, Kevin was 5 lb heavier than Jennifer. Kevin gained 13 lb and Jennifer gained 9 lb since then. How much is Kevin heavier than Jennifer now (in lb)? 7. Below are the numbers from 0 to 9 made of matchsticks.
How many matchsticks will be required to make the two-digit number 59? 8. Among three stundents of Steve, George and John, George is not the tallest. Steve is not the shortest, nor is the tallest. Who is the tallest among them? 9. One stroke drawing means that you have to finish a figure with a single stroke from the beginning to the end, without moving the pen off from the paper. You are not allowed to draw the same line twice, however a line can intersect or touch itself. Can the following figure be drawn with one stroke?
10. Figure out the rule used to arrange the numbers, then decide what number should come next in the series.
391521 ⇒
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