1. A researcher is investigating the relationship between the concentration of a pollutant in a river and the diversity of aquatic organisms. They collect data on the pollutant concentration and the number of different species of aquatic organisms at multiple sites along the river. Which statistical analysis should the researcher use to determine the strength and direction of the relationship between pollutant concentration and species diversity?

2. Five athletes competed in a triathlon. Tom finished before Sarah but after Mike. Lisa finished last, and Alex finished second. Who finished fourth?

3. A student must complete four assignments: Math, English, Science, and History. Math must be done before Science, and English must be done last. What is a possible order for completing these assignments?

4. VACCINE : DISEASE :: ANTIDOTE : ?

5. In a certain code language, '123' means 'hot spicy food', '356' means 'very spicy curry' and '589' means 'curry is hot'. Which digit represents 'is'?

6. Five books are stacked on a table. The red book is above the blue book, the green book is below the yellow book, and the blue book is above the green book. If the white book is between the yellow and red books, what is the order of the books from top to bottom?

7. In a certain code, MOON is written as 9664 and STAR is written as 7825. How would MARS be written in this code?

8. All birds have feathers. Penguins have feathers. Therefore, penguins are birds. This argument is:

9. If 3 workers can paint a house in 10 days working 6 hours per day, how many days will it take 5 workers to paint the same house working 8 hours per day?

10. What is the next shape in this sequence? Circle, Oval, Triangle, Rectangle, ?