Teachoo MCQ Test

10 Question MCQ (including Assertion)

Preparing for CBSE

Chapter 6 Class 8 - We Distribute yet things Multiply (Ganita Prakash) | 10 questions

Timed test. Answer every question before time runs out. Correct answers and solutions appear after submission.
Time remaining 936
Question 1 of 10
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Question 1 of 10
Simplify \(2(x-1)+3(x+4)\).
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Question 2 of 10
A student writes \((2x+3)^2=4x^2+9\). Which term has been omitted?
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Question 3 of 10
A square has side \(x+3\). A smaller square of side \(x\) is removed. What is the remaining area?
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Question 4 of 10
Assertion (A): If a product stays unchanged when the first factor is increased by 2 and the second is decreased by 4, then \(b=a+2\).
Reason (R): From \((a+2)(b-4)=ab\), we obtain \(b=2a+4\).
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Question 5 of 10
Assertion (A): \((a+b)^2=a^2+2ab+b^2\).
Reason (R): \(a^2-b^2=(a+b)(a-b)\).
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Question 6 of 10
Which expression is equivalent to \((m+n)^2-4mn\)?
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Question 7 of 10

Assertion (A): \((6n+2)^2-(4n+3)^2\) is always 5 less than a square number.
Reason (R): For \(n=1\), the expression is 15, and \(15+5=20\) is not a square number.

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Question 8 of 10
Use an identity to find \(48\times52\).
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Question 9 of 10
Simplify \((x-y)(x^3+x^2y+xy^2+y^3)\).
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Question 10 of 10
The product is \(ab\). If only \(b\) is increased by 1, by how much does the product increase?
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