OSAT OSAT Elementary Mathematics Concepts 5 — Questions and Answers
Question 1: A number is divisible by both 2 and 3. Which of the following must also be a divisor of that number?
- 4
- 5
- 6 (Correct answer)
- 9
Correct answer: 6
If a number is divisible by both 2 and 3, it must be divisible by their LCM, which is 6.
Question 2: On a coordinate plane, what are the coordinates of the origin?
- (1, 1)
- (0, 1)
- (1, 0)
- (0, 0) (Correct answer)
Correct answer: (0, 0)
The origin is the point where the x-axis and y-axis intersect, located at (0, 0).
Question 3: What is the mean (average) of the data set {8, 12, 10, 14, 6}?
- 8
- 10 (Correct answer)
- 12
- 14
Correct answer: 10
Mean = (8 + 12 + 10 + 14 + 6) ÷ 5 = 50 ÷ 5 = 10.
Question 4: A triangle with all three sides of different lengths is called what?
- Equilateral
- Isosceles
- Scalene (Correct answer)
- Right
Correct answer: Scalene
A scalene triangle has no equal sides, whereas equilateral has three equal and isosceles has two equal sides.
Question 5: Which of the following is NOT a rational number?
- 0.333…
- √4
- √5 (Correct answer)
- 7/2
Correct answer: √5
√5 is irrational because it cannot be expressed as a ratio of two integers; √4 = 2 is rational.
Question 6: A train travels at 60 miles per hour. How far does it travel in 2.5 hours?
- 100 miles
- 120 miles
- 140 miles
- 150 miles (Correct answer)
Correct answer: 150 miles
Distance = rate × time = 60 × 2.5 = 150 miles.
Question 7: Which transformation slides a figure to a new position without rotating or flipping it?
- Reflection
- Rotation
- Translation (Correct answer)
- Dilation
Correct answer: Translation
A translation moves every point of a figure the same distance in the same direction without changing its orientation.
OSAT OSAT Elementary Mathematics Concepts 5
A number is divisible by both 2 and 3.
Which of the following must also be a divisor of that number?