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Class 8 Maths Quiz

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Questions and Answers

What is the value of 'x' in the equation 3x + 7 = 16?

5 (correct)

What is the sum of the angles in a triangle?

270 degrees

180 degrees (correct)

90 degrees

360 degrees

Which of the following is a prime number?

29 (correct)

What is the value of 'x' in the equation 2x + 5 = 15?

10 (D) Signup and view all the answers

Which of the following is an example of a rational number?

0.25 (D) Signup and view all the answers

What is the formula to find the area of a circle?

A = πr^2 (A) Signup and view all the answers

Flashcards

Value of x in 3x + 7 = 16

Solving for 'x' in the equation 3x + 7 = 16 gives x = 3

Triangle angles sum

The sum of the angles in any triangle equals 180 degrees.

Prime number example

29 is a whole number greater than 1, only divisible by 1 and itself.

Value of x in 2x + 5 = 15

Isolate 'x' to find x = 5

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Rational number example

0.25 is a rational number because it can be expressed as a fraction (1/4).

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Area of a circle formula

Area of a circle is found using the formula A = πr²

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Study Notes

Algebraic Equations

To find the value of 'x' in the equation 3x + 7 = 16, subtract 7 from both sides and then divide by 3, resulting in x = 3.
To find the value of 'x' in the equation 2x + 5 = 15, subtract 5 from both sides and then divide by 2, resulting in x = 5.

Geometry

The sum of the angles in a triangle is 180 degrees.

Number Properties

A prime number is a whole number greater than 1 that is divisible only by 1 and itself.
Example of a prime number: not specified, but could be 2, 3, 5, etc.

Rational Numbers

A rational number is a number that can be expressed as the quotient or fraction of two integers, e.g. 3/4, 22/7.

Circle Properties

The formula to find the area of a circle is A = πr^2, where A is the area and r is the radius.

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Description

Test your knowledge on Class 8 Maths topics such as triangle angles, prime numbers, and solving equations. Answer questions like finding the sum of angles in a triangle and determining prime numbers. Challenge yourself with equations like finding the value of 'x'.