Class 8 Exam  >  Class 8 Tests  >  Mathematics (Maths) Class 8  >  Test: Algebraic Expressions And Identities- 2 - Class 8 MCQ

Test: Algebraic Expressions And Identities- 2 - Class 8 MCQ


Test Description

30 Questions MCQ Test Mathematics (Maths) Class 8 - Test: Algebraic Expressions And Identities- 2

Test: Algebraic Expressions And Identities- 2 for Class 8 2024 is part of Mathematics (Maths) Class 8 preparation. The Test: Algebraic Expressions And Identities- 2 questions and answers have been prepared according to the Class 8 exam syllabus.The Test: Algebraic Expressions And Identities- 2 MCQs are made for Class 8 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Algebraic Expressions And Identities- 2 below.
Solutions of Test: Algebraic Expressions And Identities- 2 questions in English are available as part of our Mathematics (Maths) Class 8 for Class 8 & Test: Algebraic Expressions And Identities- 2 solutions in Hindi for Mathematics (Maths) Class 8 course. Download more important topics, notes, lectures and mock test series for Class 8 Exam by signing up for free. Attempt Test: Algebraic Expressions And Identities- 2 | 35 questions in 40 minutes | Mock test for Class 8 preparation | Free important questions MCQ to study Mathematics (Maths) Class 8 for Class 8 Exam | Download free PDF with solutions
Test: Algebraic Expressions And Identities- 2 - Question 1

The number of terms in the expression 2x2+3x+5 is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 1

Yes 3 as the terms are 2x2 ,3x, 5

Test: Algebraic Expressions And Identities- 2 - Question 2

The coefficient of x in the expression -7x +5 is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 2
- Term with x: In the expression -7x + 5, the term containing x is -7x.
- Coefficient Definition: The coefficient is the numerical factor multiplying the variable.
- Identifying the Coefficient: Here, -7 is the number multiplying x.
- Conclusion: Therefore, the coefficient of x is -7.

Answer: b) -7
1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Algebraic Expressions And Identities- 2 - Question 3

The numerical coefficient of y in the expression 2x+3y+7z is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 3

Since the expression 2x+3y+7z cannot be added as they have different variables so the coefficient of y is 3 only.

Test: Algebraic Expressions And Identities- 2 - Question 4

The expression y+z+100 is a

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 4
  • The expression y + z + 100 consists of three distinct terms: y, z, and 100.
  • A monomial has only one term, while a binomial has two terms.
  • Since there are three terms in this expression, it is classified as a trinomial.
  • Therefore, the correct answer is option 4: trinomial.
Test: Algebraic Expressions And Identities- 2 - Question 5

The expression 7xy has the factors

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 5
The expression has different factors that are 7,x,y because an expression can't be made without factors.
Test: Algebraic Expressions And Identities- 2 - Question 6

The common factors of 2y. 22xy is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 6

Factors of 22xy are 2*11*x*y, so common factors are 2y.

Test: Algebraic Expressions And Identities- 2 - Question 7

‘2’ is common factor of the expressions

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 7
- Option 3: 10x², -18x³, 14x⁴
- Numerical Factors: 10, -18, and 14 are all divisible by 2.
- Variable Factors: Each term has at least x².
- Greatest Common Factor: 2x².
- Other Options:
- Option 1: Common factor is 3ab.
- Option 2: Common factor is 5x.
- Option 4: Common factor is 11.
- Conclusion: Only Option 3 has 2 as a common factor.
Test: Algebraic Expressions And Identities- 2 - Question 8

The factorization of 7a2+14a is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 8

Take out the common factor, which is 7a.

Test: Algebraic Expressions And Identities- 2 - Question 9

The addition of ab-bc, bc-ca, ca-ab is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 9

ab-bc+bc-ca+ca-ab=0, because we have ab-ab,bc-bc,ca-ca all equal to zero.

Test: Algebraic Expressions And Identities- 2 - Question 10

One of the example of binomial is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 10

3xy+z contains two terms clearly , so it is binomial
whereas in 3xyz it is monomial
3x+y+z contains 3 term so it is trinomial
3+x+y+z contains 4 terms so it quadrinomial.

Test: Algebraic Expressions And Identities- 2 - Question 11

The area of rectangle is’ xy’ where’ x’ is length and ‘y’ is breadth. If the length of rectangle is increased by 5 units and breadth is decreased by 3 units, the new area of rectangle will be

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 11

initial area = xy

after increaasing length by 5 units and breadth is decreased by 3 units

new length = x+5

new breadth = y-3

new area = (x+5)(y-3)

Test: Algebraic Expressions And Identities- 2 - Question 12

The value of 2x (-3x) is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 12
We must multiply 2 with 3 an we get -6 and multiply x with x is equal to x2 therefore d is the answer.
Test: Algebraic Expressions And Identities- 2 - Question 13

Like terms in the expression 7x,5x2,7y, -5yx, -9x2, are

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 13

Like terms consist of same variables with same powers.

Test: Algebraic Expressions And Identities- 2 - Question 14

Area of rectangle of length’ 3x’ and breadth ‘5y ‘is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 14

Test: Algebraic Expressions And Identities- 2 - Question 15

Number of terms in the expression xyz+1 is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 15

Correct answer is C. 2

Test: Algebraic Expressions And Identities- 2 - Question 16

The product of -4p and 7p is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 16

The product of  -4p × 7p = (- 4×7)p2 = - 28p2

Test: Algebraic Expressions And Identities- 2 - Question 17

Multiplication of pq+qr+rp and ‘zero’ is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 17

- When multiplying any expression by zero, the result is always zero.
- Thus, the product of pq+qr+rp and ‘zero’ is 0.

Answer: D: 0

Test: Algebraic Expressions And Identities- 2 - Question 18

The value of 3a(4a-5)+3 for a = 3

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 18

3a(4a-5)+3 for a = 3
3x3 (4x3 - 5 ) + 3
9 x (12 - 5) + 3
9 x 7 + 3
63 + 3
66

Test: Algebraic Expressions And Identities- 2 - Question 19

The volume of rectangular box whose length, breadth and height is 2p,4q.8r respectively is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 19

length = 2p
breadth =4q
height =8r
Volume = length x breadth x height
=2p x 4q x 8r
=64pqr
Answer : 64pqr

Test: Algebraic Expressions And Identities- 2 - Question 20

Which of the following expression is trinomial

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 20

Test: Algebraic Expressions And Identities- 2 - Question 21

Which of the following expression is monomial

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 21

Test: Algebraic Expressions And Identities- 2 - Question 22

Multiplication of ‘ab’ and ‘a-b’ is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 22
- To find the multiplication of 'ab' and 'a - b', use the distributive property.
- This means you multiply 'ab' by both 'a' and '-b'.
- So, you compute:
- ab * a = a^2b
- ab * -b = -ab^2
- Combine these results: a^2b - ab^2.
- Hence, the correct answer is option 4: a^2b - ab^2.
Test: Algebraic Expressions And Identities- 2 - Question 23

Value of (4p – 3q)2 is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 23

Using (a - b)2 
(4p - 3q)
= 16p- 24pq + 9q2

Test: Algebraic Expressions And Identities- 2 - Question 24

(9x+a)(x+b) is equal to

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 24

9x(x+b)+a(x+b)

=9x2 + 9bx+ax+ab

=9x2+x(9b+a)+ab

Test: Algebraic Expressions And Identities- 2 - Question 25

Value of expression ‘a(a2+a +1)+5’ for ‘ a’ = 0 is

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 25
It's correct ans would be 5 because if a,=0 then a( a²+ a+ 1)+5 so, if a=0 then, 0(0²+ 0+ 1) +5 0x(0x0+0+1)+5 0x1 +5 any no multiplied by 0 is 0 so, 0x1 =0+5=5 therefore, the correct ans is 5.
Test: Algebraic Expressions And Identities- 2 - Question 26

Which of the following is not binomial

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 26

Test: Algebraic Expressions And Identities- 2 - Question 27

Subtracting 7x +y from –x +y gives

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 27

-x + y - (7x + y)

= -8x

Test: Algebraic Expressions And Identities- 2 - Question 28

Which identity is used to evaluate (m+3)(m+2).

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 28

To evaluate (m - 3)(m - 2), we use the identity for multiplying two binomials, which is:
(x - a)(x - b) = x2 - (a + b)x + ab
- In this case:
a = 3
b = 2
x = m
 

Test: Algebraic Expressions And Identities- 2 - Question 29

Use suitable identity to evaluate 992.

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 29

99 can be written as 100-1

992 = (100 -1)2 = 1002 + 1 -200

= 10000 + 1 -200

= 9801

 

Test: Algebraic Expressions And Identities- 2 - Question 30

Evaluate (4x+y)by suitable identity

Detailed Solution for Test: Algebraic Expressions And Identities- 2 - Question 30

View more questions
79 videos|408 docs|31 tests
Information about Test: Algebraic Expressions And Identities- 2 Page
In this test you can find the Exam questions for Test: Algebraic Expressions And Identities- 2 solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Algebraic Expressions And Identities- 2, EduRev gives you an ample number of Online tests for practice

Top Courses for Class 8

79 videos|408 docs|31 tests
Download as PDF

Top Courses for Class 8