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11. A couple have 3 children. None of the children were born in a leap year. The probability that all three children share the same birthday is: a. 3/365 b. […]

10. The mean of ten exam scores is 20. When two more scores are added, the mean becomes 30. What is the mean of the two scores added? a. 20 […]

9. The first quartile of a list of values is: a. Half the mean of the values b. One standard deviation below the mean of the values c. The median […]

8. In a cricket championship there are 36 matches. What is the number of teams participating if each team plays exactly one match with every other team? a. 8 b. […]

7. Pluto has been reclassified as a “dwarf planet” rather than a “planet” because a. its orbit around the sun is not circular b. it is smaller than the Earth […]

6. What number should come next in this series? 7, 10, 8, 11, 9, 12, … a. 7 b. 10 c. 12 d. 13 The next number in the series […]

5. The area of a hallway is m when measured in square metres, and f when measured in square feet. The equation that relates m to f is a. m […]

4. The term “El niño” refers to: a. a species of butterfly b. the ninth thoracic vertebra c. the chemical element Fluorine d. a periodic warming of the ocean Here’s […]

3. Cholesterol levels are measured for a random sample of 1,000 persons. The survey is repeated for the same population, but with the sample size tripled to 3,000. Which one […]

2. Fish spend a lot of energy removing oxygen from water. Which one of the following is the most plausible reason? a. The CO2 content of their tissues is much […]