IQ Test For 8th Graders: Check Your Kids IQ
Curious about your child's intellectual potential? Our IQ test 8th grade edition is designed to challenge young minds with logic, math, and reasoning questions. This engaging assessment helps assess cognitive skills while making learning fun. No matter if your child excels in problem-solving or needs a confidence boost, this test offers valuable insights into their strengths.
Taking an IQ test for 8th graders can be a great way to track academic progress and identify areas for improvement. This quiz enhances critical thinking and mental agility. It’s not just about scores—it’s about understanding potential! Give your child the opportunity Read moreto shine and see where they stand among their peers. Let’s get started!
8th Grader Math Questions and Answers
- 1.
What is the length of a line segment with endpoints at (1, 3) and (4, 3)?
- A.
1 Unit
- B.
2 Units
- C.
3 Units
- D.
4 Units
Correct Answer
C. 3 Units -
- 2.
What number must be subtracted from 7 to get -7?
- A.
-14
- B.
7
- C.
1
- D.
14
Correct Answer
D. 14 -
- 3.
What is the absolute value of -3 - 2?
- A.
4
- B.
1
- C.
5
- D.
3
Correct Answer
C. 5Explanation
The absolute value of a number is its distance from zero on the number line, regardless of direction. To find the absolute value of -3 - 2, you first need to evaluate the expression inside the absolute value brackets:
|-3 - 2| = |-5|
Now, since -5 is 5 units away from zero on the number line, the absolute value is 5.
Therefore, the absolute value of -3 - 2 is 5.Rate this question:
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- 4.
What is the complement of a 76 degree angle?
- A.
14 Degrees
- B.
104 Degrees
- C.
16 Degrees
- D.
24 Degrees
Correct Answer
A. 14 Degrees -
- 5.
What is 10 degrees Celsius in Fahrenheit?
- A.
16 Degrees
- B.
50 Degrees
- C.
34 Degrees
- D.
76 Degrees
Correct Answer
B. 50 Degrees -
- 6.
How many sides does a trapezoid have?
- A.
5
- B.
6
- C.
3
- D.
4
Correct Answer
D. 4Explanation
The correct answer is 4. A trapezoid is a quadrilateral, which means it has four sides. One pair of opposite sides in a trapezoid is parallel, distinguishing it from other quadrilaterals. Additionally, a trapezoid has two non-parallel sides of different lengths. This unique characteristic allows for various properties and calculations to be determined within the shape. Knowing that a trapezoid has four sides is essential for understanding its geometric properties and how it differs from other shapes.Rate this question:
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- 7.
What is -1 times -2 times -3 times -4?
- A.
-12
- B.
12
- C.
-24
- D.
24
Correct Answer
D. 24Explanation
When multiplying negative numbers together, the product follows the rules of multiplication, but the result will be positive if there is an even number of negative factors and negative if there is an odd number of negative factors.
In this case, you have four negative numbers:
-1 * -2 * -3 * -4
Since there are four negative numbers, an even number, the product will be positive.
Now, let's calculate the product:
(-1) * (-2) * (-3) * (-4) = 24
So, -1 times -2 times -3 times -4 equals 24.Rate this question:
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- 8.
There are two children in a family, what is the probability that both are girls?
- A.
25 percent
- B.
40 percent
- C.
75 percent
- D.
100 percent
Correct Answer
A. 25 percent -
- 9.
What is true about vertical angles?
- A.
They are always congruent.
- B.
They are always 90 degrees.
- C.
They are always supplementary.
- D.
They are always complementary.
Correct Answer
A. They are always congruent.Explanation
Vertical angles are formed when two lines intersect. They are the angles that are opposite each other, and they always have the same measure (meaning they are congruent). The other options are incorrect because vertical angles don't have to be 90 degrees (that's only if the lines are perpendicular), and they don't add up to 90 or 180 degrees unless the lines are perpendicular. Sources and related contentRate this question:
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- 10.
If 721 out of 950 people like basketball, how many of 10,000 should like basketball (rounded)?
- A.
7700
- B.
7500
- C.
7589
- D.
7210
Correct Answer
C. 7589 -
- 11.
What is 5 degrees Celsius in Fahrenheit?
- A.
21 Degrees
- B.
45 Degrees
- C.
41 Degrees
- D.
37 Degrees
Correct Answer
C. 41 Degrees -
- 12.
What is the complement of a 16 degree angle?
- A.
64 Degrees
- B.
54 Degrees
- C.
74 Degrees
- D.
84 Degrees
Correct Answer
C. 74 Degrees -
- 13.
What is the supplement of a 176 degree angle?
- A.
24 Degrees
- B.
14 Degrees
- C.
-4 Degrees
- D.
4 Degrees
Correct Answer
D. 4 Degrees -
- 14.
If f(x) = 2x - 3, what is f(-3)?
- A.
-9
- B.
9
- C.
3
- D.
-3
Correct Answer
A. -9 -
- 15.
How many milliliters are in one cubic centimeters?
- A.
1/2 Milliliter
- B.
1 Milliliter
- C.
2 Milliliters
- D.
10 Milliliters
Correct Answer
B. 1 MilliliterExplanation
One cubic centimeter is equal to one milliliter. This is because the volume of a cube with sides measuring one centimeter is equal to one cubic centimeter, and since one milliliter is equivalent to one cubic centimeter, the answer is 1 milliliter. Therefore, there are 1 milliliter in one cubic centimeter. This conversion is commonly used in the measurement of liquids. This conversion is particularly useful in the field of chemistry for accurately measuring and calculating volumes of liquids. It simplifies calculations and ensures precision in scientific experiments and formulations.Rate this question:
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- 16.
How many cc's are in 15 mL?
- A.
0.15 cc
- B.
150 cc
- C.
15 cc
- D.
1.5 cc
Correct Answer
C. 15 cc -
- 17.
What is 37 degrees Celsius in Fahrenheit?
- A.
98.6 Degrees
- B.
100 Degrees
- C.
65 Degrees
- D.
37 Degrees
Correct Answer
A. 98.6 Degrees -
- 18.
What value of x makes "8 + x = 0.8" a true statement?
- A.
-7.2
- B.
-8.800000000000001
- C.
7.2
- D.
8.800000000000001
Correct Answer
A. -7.2 -
- 19.
How many seconds are in 26.9 minutes?
- A.
16140
- B.
2690
- C.
1614
- D.
269
Correct Answer
C. 1614 -
- 20.
What is (3a + b)/2c if a = 3, b = 2 and c = 5?
- A.
2.2
- B.
2.4
- C.
1.1
- D.
3.3
Correct Answer
C. 1.1 -
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Jan 31, 2025Quiz Edited by
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Expert Reviewed by
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May 14, 2015Quiz Created by
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