OSAT OSAT Elementary Mathematics Concepts 3 — Questions and Answers
Question 1: Which property is illustrated by 5 × (2 + 3) = 5 × 2 + 5 × 3?
- Commutative property
- Associative property
- Distributive property (Correct answer)
- Identity property
Correct answer: Distributive property
The distributive property states that a × (b + c) = a × b + a × c.
Question 2: A class of 28 students is divided into equal groups of 4. How many groups are there?
- 5
- 6
- 7 (Correct answer)
- 8
Correct answer: 7
28 ÷ 4 = 7 equal groups.
Question 3: Which decimal is equivalent to 3/4?
- 0.34
- 0.50
- 0.75 (Correct answer)
- 0.80
Correct answer: 0.75
3 ÷ 4 = 0.75, so 3/4 is equivalent to the decimal 0.75.
Question 4: What is the perimeter of a square with a side length of 7 inches?
- 14 inches
- 21 inches
- 28 inches (Correct answer)
- 49 inches
Correct answer: 28 inches
Perimeter of a square = 4 × side = 4 × 7 = 28 inches.
Question 5: A store has 120 pencils and sells 45. What percentage of the original supply remains?
- 37.5%
- 45%
- 62.5% (Correct answer)
- 75%
Correct answer: 62.5%
Remaining pencils = 120 − 45 = 75; 75/120 = 0.625 = 62.5%.
Question 6: On a number line, which point is between −3 and −1?
- −4
- −2 (Correct answer)
- 0
- 1
Correct answer: −2
−2 lies between −3 and −1 on the number line.
Question 7: What is the least common multiple (LCM) of 4 and 6?
- 2
- 8
- 12 (Correct answer)
- 24
Correct answer: 12
The multiples of 4 are 4, 8, 12… and of 6 are 6, 12…; the smallest shared multiple is 12.
OSAT OSAT Elementary Mathematics Concepts 3
Which property is illustrated by 5 × (2 + 3) = 5 × 2 + 5 × 3?