Grade 8 Preview Assessment

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| By Melmorri
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Melmorri
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| Attempts: 672 | Questions: 5
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1. 1. Which number is not a perfect square?

Explanation

The numbers 100, 169, and 441 are all perfect squares because they can be expressed as the square of an integer (10, 13, and 21 respectively). However, 50 is not a perfect square because there is no integer that can be squared to give 50.

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About This Quiz
Difference Of Squares Quizzes & Trivia

The 'Grade 8 preview assessment' quiz evaluates essential mathematical skills such as identifying non-perfect squares, calculating square roots, and determining side lengths and areas of squares. It is... see moredesigned to test and enhance 8th-grade students' understanding of fundamental math concepts. see less

2. A square has an area of 12 cm2. Its side length is

Explanation

The area of a square is calculated by multiplying the length of one side by itself. In this case, the area is given as 12 cm2. To find the side length, we need to take the square root of the area. The square root of 12 is between 3 and 4. Therefore, the side length of the square is between 3 cm and 4 cm.

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3. Which square root cannot be expressed as a whole number?

Explanation

The square root of 125 cannot be expressed as a whole number because there is no integer that, when multiplied by itself, equals 125. The square root of 125 is an irrational number, meaning it cannot be expressed as a fraction or a whole number.

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4. The unknown side length is approximately

Explanation

The correct answer is 25.6 cm because it is the only option that is a plausible length for an unknown side. The other options, 52 cm, 484 cm, and 48.4 cm, are all too large to be a side length of a typical object. Therefore, 25.6 cm is the most reasonable choice for the unknown side length.

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5. The area of a square drawn on side GH would be      

Explanation

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1. Which number is not a perfect square?
A square has an area of 12 cm2. Its side length is
Which square root cannot be expressed as a whole number?
The unknown side length is approximately
The area of a square drawn on side GH would be     ...
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