ACT考试策略技巧大全(20)

Mathematics

The ACT Mathematics test measures a test taker’s ability to solve problems representing some of the key concepts in mathematics. Some problems will only test one concept, while others will involve multiple concepts integrated together in a single problem.

The problems will have few technical terms, aside from basics, such as area, perimeter, integer, and ratio, which are expected to be common mathematical knowledge. All figures shown will be drawn accurately and lie in a single plane, unless noted otherwise.

Number Types

Integers, Odd and Even Numbers, Prime Numbers, Digits

Integers…, -4, -3, -2, -1, 0, 1, 2, 3, 4, …

Consecutive Integers: Integers that follow in sequence; for example, 22, 23, 24, 25. Consecutive Integers can be more

generally represented by n, n + 1, n + 2, n + 3, …

Odd Numbers…, -9, -7, -5, -3, -1, 1, 3, 5, 7, 9, …

Even Numbers…, -8, -6, -4, -2, 0, 2, 4, 6, 8, … (Note: zero is an even number)

Prime Numbers…, 2, 3, 5, 7, 11, 13, 17, 19, … (Note 1 is not a prime and 2 is the only even prime)

Digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

Addition and Multiplication of Odd and Even Numbers