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Quantitative Aptitude

ALGEBRA MCQs

Basic Algebraic Identities Of School Algebra & Elementary Surds

Total Questions : 1010 | Page 7 of 101 pages
Question 61.  what is the multiplicative inverse of 1/2 ?
  1.    -2
  2.    2
  3.    -1/2
  4.    1/2
 Discuss Question
Answer: Option B. -> 2
Explanation :
Question 62.  what is the solution for this equation? 2x −3 = 5
  1.    x =−1 or x = 4 
  2.    x =−1 or x = 3 
  3.    x =−4 or x = 4 
  4.    x =−4 or x = 3 
 Discuss Question
Answer: Option A. -> x =−1 or x = 4 
Explanation :
Question 63.  if -4x + 5y is subtracted from 3x + 2y then answer will be
  1.    x - 3y
  2.    x + 3y
  3.    2x + 5y
  4.    3x + 6y
 Discuss Question
Answer: Option A. -> x - 3y
Explanation :
Question 64.  by factorizing expression 2bx + 4by - 3ax -6ay, answer must be
  1.    (2b - 3a)(x + 2y)
  2.    (2b + 3a)(x - 2y)
  3.    (2a- 3b)(3x - 2y)
  4.    (2a + 3b)(2x - 4y)
 Discuss Question
Answer: Option A. -> (2b - 3a)(x + 2y)
Explanation :
Question 65.  on solving algebraic expression -38b⁄2, answer will be
  1.    19b
  2.    −19b
  3.    56b
  4.    −56b
 Discuss Question
Answer: Option B. -> −19b
Explanation :
Question 66.  if -4x + 5y is subtracted from 3x + 2y then answer will be
  1.    x - 3y
  2.    x + 3y
  3.    2x + 5y
  4.    3x + 6y
 Discuss Question
Answer: Option A. -> x - 3y
Explanation :
Question 67.  answer of factorization of expression 4z(3a + 2b - 4c) + (3a + 2b - 4c) is
  1.    (4z - 1)(3a - 2b -4c)
  2.    (4z + 1)(3a + 2b -4c)
  3.    (4z + 1) - (3a + 2b -4c)
  4.    (4z + 1) + (3a + 2b -4c)
 Discuss Question
Answer: Option B. -> (4z + 1)(3a + 2b -4c)
Explanation :
Question 68.  on solving algebraic expression -38b⁄2, answer will be
  1.    19b
  2.    −19b
  3.    56b
  4.    −56b
 Discuss Question
Answer: Option B. -> −19b
Explanation :
Question 69.  answer of factorization of expression 4z(3a + 2b - 4c) + (3a + 2b - 4c) is
  1.    (4z - 1)(3a - 2b -4c)
  2.    (4z + 1)(3a + 2b -4c)
  3.    (4z + 1) - (3a + 2b -4c)
  4.    (4z + 1) + (3a + 2b -4c)
 Discuss Question
Answer: Option B. -> (4z + 1)(3a + 2b -4c)
Explanation :
Question 70.  the set of all real numbers under the usual multiplication operation is not a group since
  1.    zero has no inverse
  2.    identity element does not exist
  3.    multiplication is not associative
  4.    multiplication is not a binary operation
 Discuss Question
Answer: Option A. -> zero has no inverse
Explanation :

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