OSAT OSAT Elementary Mathematics Concepts 4 — Questions and Answers
Question 1: A survey shows 12 out of 30 students prefer math. What fraction in simplest form represents this?
- 12/30
- 2/5 (Correct answer)
- 3/10
- 6/15
Correct answer: 2/5
12/30 simplifies to 2/5 when both numerator and denominator are divided by 6.
Question 2: Which angle measures exactly 90°?
- Acute angle
- Right angle (Correct answer)
- Obtuse angle
- Straight angle
Correct answer: Right angle
A right angle measures exactly 90° and is often marked with a small square symbol.
Question 3: What is 15% of 200?
- 15
- 25
- 30 (Correct answer)
- 35
Correct answer: 30
15% of 200 = 0.15 × 200 = 30.
Question 4: A recipe calls for 2/3 cup of sugar. If you triple the recipe, how much sugar is needed?
- 1 cup
- 1 1/3 cups
- 2 cups (Correct answer)
- 2 1/3 cups
Correct answer: 2 cups
2/3 × 3 = 6/3 = 2 cups of sugar.
Question 5: In a data set {4, 7, 7, 9, 13}, what is the mode?
- 4
- 7 (Correct answer)
- 9
- 13
Correct answer: 7
The mode is 7 because it appears more frequently than any other value in the set.
Question 6: A rectangular prism has length 5, width 3, and height 2. What is its volume?
- 10 cubic units
- 16 cubic units
- 30 cubic units (Correct answer)
- 48 cubic units
Correct answer: 30 cubic units
Volume = length × width × height = 5 × 3 × 2 = 30 cubic units.
Question 7: Which expression shows the commutative property of addition?
- 3 + (4 + 5) = (3 + 4) + 5
- 6 + 0 = 6
- 7 + 8 = 8 + 7 (Correct answer)
- 9 × 1 = 9
Correct answer: 7 + 8 = 8 + 7
The commutative property of addition states that a + b = b + a, as shown by 7 + 8 = 8 + 7.
OSAT OSAT Elementary Mathematics Concepts 4
A survey shows 12 out of 30 students prefer math.
What fraction in simplest form represents this?