OLSAT OLSAT 8th Grade 1 — Questions and Answers
Question 1: What is the next number in the sequence: 3, 7, 13, 21, 31, ___?
- 38
- 41
- 43 (Correct answer)
- 45
Correct answer: 43
Differences are 4, 6, 8, 10, so the next difference is 12: 31 + 12 = 43.
Question 2: Nocturnal is to daytime as carnivore is to ___.
- Predator
- Herbivore (Correct answer)
- Animal
- Hunter
Correct answer: Herbivore
Nocturnal is the opposite of daytime activity; a carnivore eats meat, opposite to an herbivore that eats plants.
Question 3: If a train travels 60 mph for 2.5 hours, how far does it travel?
- 120 miles
- 140 miles
- 150 miles (Correct answer)
- 160 miles
Correct answer: 150 miles
Distance = speed × time = 60 × 2.5 = 150 miles.
Question 4: Which statement represents inductive reasoning?
- All squares have 4 sides; this is a square, so it has 4 sides
- Every swan I've seen is white, so all swans are white (Correct answer)
- If p then q; p is true, therefore q
- Two parallel lines never intersect by definition
Correct answer: Every swan I've seen is white, so all swans are white
Inductive reasoning draws general conclusions from specific observations, as in the swan example.
Question 5: Solve: 2(x − 3) = 4x − 10. What is x?
- 1
- 2 (Correct answer)
- 3
- 4
Correct answer: 2
2x − 6 = 4x − 10; −6 + 10 = 4x − 2x; 4 = 2x; x = 2.
Question 6: Ambiguous is to clear as verbose is to ___.
- Talkative
- Lengthy
- Concise (Correct answer)
- Wordy
Correct answer: Concise
Ambiguous and clear are antonyms; verbose and concise are antonyms.
OLSAT OLSAT 8th Grade 1
What is the next number in the sequence: 3, 7, 13, 21, 31, ___?