1. If A = {1, 3, 5, 7, 9, 11, 13, 15} and B = {3, 6, 9, 12, 15}, find n(A∩B).

3 2 4 5

2. If P = {4, 8, 12, 16, 20} and Q = {16, 4, 12, k, 20}, and P = Q, find the value of k.

8 16 20 4

3. In a Venn diagram, set Q has 30 members and set T has 25 members. Q∩T has 10 members. Find n(Q∪T).

45 55 35 65

4. Which of the following best describes the intersection (∩) of two sets?

The set of elements found in both sets The set of all elements from both sets combined The set of elements found in neither set The set of elements found only in the first set

5. Which of the following best describes disjoint sets?

Sets that have no elements in common Sets that have all elements in common Sets with an equal number of elements Sets containing only even numbers

6. Arrange 1.8, 1.88, 1.875 in ascending order.

1.8, 1.875, 1.88 1.88, 1.875, 1.8 1.8, 1.88, 1.875 1.875, 1.8, 1.88

7. Which of the following best defines a rational number?

A number that can be expressed as a fraction (quotient) of two integers, such as 5/8 A number that cannot be written as a fraction Only negative whole numbers A number with an infinite, non-repeating decimal

8. Evaluate: 53 − (−7) + (−15).

45 35 75 61

9. Which of the following best defines an integer?

A whole number that can be positive, negative, or zero Only positive fractions A number with a decimal point Only even numbers

10. Express 0.625 as a fraction in its lowest term.

5/8 5/16 3/8 6/25