This quiz works best with JavaScript enabled. Home > Cbse > Class 8 > Mathematics > Algebraic Expressions And Identities > Class 8 Maths Chapter 9 Algebraic Expressions And Identities – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 8 Maths Chapter 9 Algebraic Expressions And Identities Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The product of 5x and 2y is A) Xy. B) 10ay. C) 2xy. D) 10xy. Show Answer Correct Answer: D) 10xy. 2. 3w$^{2}$-(2x)$^{2}$ when w=10 and x=8 A) 44. B) 172. C) 64. D) 644. Show Answer Correct Answer: A) 44. 3. Simplify the expression (simplificar):7+3(1-2x) A) 10-X. B) 21-shi. C) 10-shi. D) 10-20x. Show Answer Correct Answer: C) 10-shi. 4. The length of a rectangle is decreased by 3 and breadth is increased by 4. The new area of the rectangle found after changing it's dimensions is same as that of original rectangle before any changes were made.Which among below is a correct equation?Consider length of rectangle to be 'l' and breadth of rectangle to be 'b' A) 4L-3B = 12. B) 3L-4B = 12. C) 4 L + Heb = 12. D) On + 4B = 12. Show Answer Correct Answer: A) 4L-3B = 12. 5. What are like terms formed from? A) The same variables with the same powers. B) The same variables with different powers. C) Different variables. D) Different coefficients. Show Answer Correct Answer: A) The same variables with the same powers. 6. If we simplify the expression 3xy + 4yz-2zx + 5yz-3xy + 6zx, what is the result? A) 2yz + 4zx + 3xy. B) 2yz + 4zx + 3xy + 5. C) 2yz + 4zx. D) 2yz + 4zx + 5xy. Show Answer Correct Answer: C) 2yz + 4zx. 7. If we add, 7xy + 5yz-3zx, 4yz + 9zx-4y and-3xz + 5x-2xy, then the answer is: A) 5xy + 9yz + 3zx + 5x-4y. B) 5xy-9yz + 3zx-5x-4y. C) 5xy + 10yz + 3zx + 15x-4y. D) 5xy + 10yz + 3zx + 5x-6y. Show Answer Correct Answer: A) 5xy + 9yz + 3zx + 5x-4y. 8. Solve (4 + z)(9-z) using suitable identity. A) -z $^{2} $+ 13Z-36. B) -z $^{2} $-13z + 36. C) -from $^{2} $ + 5Z + 36. D) -from $^{2} $+ 5Z-36. Show Answer Correct Answer: C) -from $^{2} $ + 5Z + 36. 9. Sum of p-q + pq, q + r-qr and r-p-rp is ..... A) 2r + pq-pr-qr. B) 2 R-Pak-Par-Q. C) 2r-pq + pr + qr. D) 2r + pq + pr + qr. Show Answer Correct Answer: A) 2r + pq-pr-qr. 10. Solve (x$^{ }$-1)(1-x) using suitable identity A) -x$^{2 }$+ 2x-1. B) -x$^{2 }$+ x-1. C) -x$^{2 }$-2x-1. D) -x$^{2 }$-x-1. Show Answer Correct Answer: A) -x$^{2 }$+ 2x-1. 11. The simplified form of the expression (y$^{2}$ + 5)(y$^{2 }$-3) is A) Y$^{4 }$+ 2y$^{2}$$^{}$ + 15. B) Y$^{4 }$+ 2y$^{2}$$^{}$-15. C) Y$^{4 }$-3y$^{}$$^{2}$ + 15. D) Y$^{4 }$-3y$^{2}$$^{}$-15. Show Answer Correct Answer: B) Y$^{4 }$+ 2y$^{2}$$^{}$-15. 12. Which of the following is a like term as 8xy? A) 8Y. B) 8x. C) Xy. D) 8. Show Answer Correct Answer: C) Xy. 13. What is the product of (x+a) and (x+b)? A) X$^{2}$+ (a-b)x + ab. B) X$^{2}$ + (a+b)x-ab. C) X$^{2}$ + (a+b)x-ab. D) X$^{2}$ + (a+b)x + ab. Show Answer Correct Answer: A) X$^{2}$+ (a-b)x + ab. 14. What is an expression containing one or more terms with non-zero coefficient called? A) Monomial. B) Trinomial. C) Polynomial. D) Binomial. Show Answer Correct Answer: C) Polynomial. 15. Add (a-b-c) ; (b-a-c) and (c-a-b) A) (a-b-c). B) (-a-b + c). C) (a + b-c). D) (-a-b-c). Show Answer Correct Answer: D) (-a-b-c). 16. The product of 3xy$^{2}$z and 4x is: A) 12x$^{2}$y$^{2}$z. B) 12x$^{2}$yz. C) 12xy$^{2}$. D) 12xyz. Show Answer Correct Answer: A) 12x$^{2}$y$^{2}$z. 17. 15 decreased by 4 times a number A) 15. B) 15 x 4-n. C) HN-15. D) N-15 x 4. Show Answer Correct Answer: A) 15. 18. On dividing 57 p$^{2}$qr by 114pq, we get A) 0.5Q. B) NOT. C) 0.5pr. D) 0. Show Answer Correct Answer: C) 0.5pr. 19. Which of the following is obtained by subtracting x$^{2}$-y$^{2}$ from y$^{2 }$-x$^{2}$? A) -2 (x $^{2} $-y $^{2} $). B) -2 (x $^{2} $+ y $^{2} $). C) 2 (x $^{2} $+ y $^{2} $). D) 2 (x $^{2} $-and $^{2} $). Show Answer Correct Answer: A) -2 (x $^{2} $-y $^{2} $). 20. What step would I do second? (4-2) x 9 + 7 = A) Dividing. B) Addition. C) Subtraction. D) Multiplication. Show Answer Correct Answer: D) Multiplication. 21. The volume of a cuboid with length, breadth and height as 5x, 3x$^{2}$ and 7x$^{4}$ respectively is: A) 105x$^{2}$. B) 105x$^{4}$. C) 105x. D) 105x$^{7}$. Show Answer Correct Answer: D) 105x$^{7}$. 22. If a monomial is multiplied with a monomial, then the result will be ..... A) A binomial. B) Polynomial with more than one term. C) A monomial. D) The trinomial. Show Answer Correct Answer: C) A monomial. 23. Expand (4x-5)(4x + 5). A) 16x$^{2}$-25. B) 4x $^{2} $-25. C) 16x$^{2}$ + 25. D) Hh $^{2} $ + 25. Show Answer Correct Answer: A) 16x$^{2}$-25. 24. What are expressions formed from? A) Variables and constants. B) Numbers and symbols. C) Functions and equations. D) Graphs and charts. Show Answer Correct Answer: A) Variables and constants. 25. Is the number 65 a monomial? A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. ← PreviousRelated QuizzesMathematics QuizzesClass 8 QuizzesClass 8 Maths Chapter 9 Algebraic Expressions And Identities Quiz 1 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books