Practice test

ACT Practice 3

Practice 3 for ACT: 25 questions, explained answers, and a review routine.

These questions are for study practice only and are not official exam questions.

Question 1

1

Original passage: The essay begins with a family's search for shade on a hot afternoon, then presents research on urban tree cover. What is the likely purpose of the opening scene?

Question 2

2

In a closed container, a reaction changes the substances present. Which measurement is expected to remain constant if no material escapes?

Question 3

3

A paragraph explains how a bridge was repaired. Which sentence would be least relevant?

Question 4

4

If i^2 = -1, what is (2 + 3i)(2 - 3i)?

Question 5

5

Original passage A: Restoring old train stations can preserve local history. Original passage B: Restoration is worthwhile when the building also gains a sustainable use, such as a market or community hall. What does B add to A?

Question 6

6

A substance's measured solubility is 20 g at 10 degrees C, 30 g at 20 degrees C, and 40 g at 30 degrees C, per 100 g water. Assuming the observed linear pattern continues, what is predicted at 40 degrees C?

Question 7

7

Choose the correct completion: The board will announce ___ decision tomorrow.

Question 8

8

A bag contains 4 red, 3 blue, and 5 green beads. One bead is selected at random. What is the probability it is not green?

Question 9

9

Original passage: An author argues that remote observations can reveal patterns missed at ground level, but field visits remain essential for checking what those patterns mean. Which statement best captures the argument?

Question 10

10

An instrument always reads 2 degrees higher than a reference thermometer. What kind of problem is indicated?

Question 11

11

Choose the correct completion: The artist, along with two assistants, ___ the mural each morning.

Question 12

12

If sin(theta) = 3/5 and theta is acute, what is cos(theta)?

Question 13

13

Original passage: The ranger described the wetland as a sponge because it absorbed excess rain and released water gradually. The comparison chiefly explains what?

Question 14

14

A claim says that all tested samples contain compound Q. One properly verified sample contains no Q. What does this observation do?

Question 15

15

A writer wants to introduce a paragraph about the advantages of commuting by bicycle. Which topic sentence is best?

Question 16

16

The first three terms of a geometric sequence are 3, 6, 12. What is the sixth term?

Question 17

17

Original passage: A chart shows 18 library workshops in spring and 30 in autumn. The author writes that offerings increased by two-thirds. Is this description accurate?

Question 18

18

Three measurements of a sample's mass are 10.1, 10.2, and 10.0 g. What is their mean?

Question 19

19

Choose the correct completion: The route was longer ___ we expected.

Question 20

20

For x > 0, solve log10(x) = 3.

Question 21

21

Original passage: When the baker said the new oven was temperamental, she pointed to loaves that browned differently at the same setting. Temperamental most nearly means what in context?

Question 22

22

A graph shows gas pressure increasing linearly from 100 kPa at 1 L to 200 kPa at 2 L under an experimental setup. What value is interpolated at 1.5 L?

Question 23

23

Choose the correct completion: The stack of journals ___ beside the window.

Question 24

24

A fair coin is tossed twice. What is the probability of exactly one head?

Question 25

25

Original passage: A company reports that customers who use its planner finish more tasks. Customers chose whether to buy the planner. Which possibility weakens a causal interpretation?

Enable JavaScript for the interactive step-by-step quiz with instant scoring and explanations.