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MCQ Questions for CBSE Class 12 with Answers
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Quiz
CBSE
/
Class 8
/
Maths
/
Linear Equations in One Variable
1.
Of the following, the linear equation in one variable x, is
\(\frac{4}{x}\) = \(\frac{x}{4}\)
\(\frac{1}{x}\) + \(\frac{1}{x-1}\) = 1
\(\frac{x}{2}\) + \(\frac{x}{3}\) + \(\frac{1}{4}\)
x² + 2x + 3 = 0.
2.
The degree of the equation x² - 2x + 1 = x² - 3 is
1
2
0
3.
3.
The statement ‘on adding 10 in a number, the number becomes 20’ in the form of an equation is
x - 10 = 20
x + 10 = 20
10x = 20
\(\frac{x}{10}\) = 20.
4.
If 9 is added to a number, it becomes 2 This statement in the form of an equation is
x + 9 = 25
x - 9 = 25
9x = 25
\(\frac{x}{9}\) = 25.
5.
If 15 is subtracted from a number, it becomes -5. This statement in the form of an equation is
x + 15 = -5
x - 15 = 5
x + 15 = 5
x - 15 = -5.
6.
Seven times a number is 42. This statement in the form of an equation is
x + 7 = 42
7x = 42
\(\frac{x}{7}\) = 42
x - 7 = 42.
7.
A number when divided by 5 gives 6. This statement in the form of an equation is
x - 5 = 6
x + 5 = 6
\(\frac{x}{5}\) = 6
5x = 6.
8.
A number when subtracted from 40 results into 15. This statement in the form of an equation is
40 - x = 15
x - 40 = 15
40 + x = 15
40x = 15.
9.
If 6 is added to 3 times of a number, it becomes 15. This statement in the form of an equation is
3x + 6 = 15
3x - 6 = 15
3x + 15 = 6
\(\frac{3x}{6}\) = 15.
10.
On subtracting 30 from two times a number, we get 56. This statement in the form of an equation is
2x - 30 = 56
2x + 30 = 56
30 - 2x = 56
\(\frac{30}{2x}\) = 56.
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