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Home Aptitude Elementary Algebra Comments

  • Question
  • What is the solution of the equations x - y = 0.9 and 11(x + y) -1 = 2?


  • Options
  • A. x = 3.2, y = 2.3
  • B. x = 1, y = 0.1
  • C. x = 2, y = 1.1
  • D. x = 1.2, y = 0.3

  • Correct Answer
  • x = 3.2, y = 2.3 

    Explanation

    x - y = 0.9 ...(i)
    and 11(x + y)-1=2
    ? 11/ (x + y) = 2
    ? 2(x + y) =11
    ? x + y = 11/2 ...(ii)
    On solving Eqs.(i) and (ii),we get
    x = 3.2
    and y = 2.3


  • Elementary Algebra problems


    Search Results


    • 1. 
      If x = 1 + ? 2, then what is the value of x 4 - 4x 3 + 4x 2?

    • Options
    • A. -1
    • B. 0
    • C. 1
    • D. 2
    • Discuss
    • 2. 
      The degree f polynomial p(x) = x 3 + 1 + 2x = 6x + 1/x is?

    • Options
    • A. 2
    • B. 4
    • C. 3
    • D. 5
    • Discuss
    • 3. 
      4/7 of a pole is in the mud. When 1/3 of it is pulled out, 250 cm of the pole is still in the mud. Find the full length of the pole .

    • Options
    • A. 1000
    • B. 1100
    • C. 950
    • D. 1050
    • Discuss
    • 4. 
      783 ÷ 9 ÷ 0.75 =?

    • Options
    • A. 130
    • B. 124
    • C. 118
    • D. 116
    • Discuss
    • 5. 
      The Numerator of a fraction is 4 less than its denominator. If the numerator is decreased by 2 and the denominator is increased by 1, then the denominator becomes eight times the numerator, then find the fraction.

    • Options
    • A. 3/7
    • B. 4/8
    • C. 2/7
    • D. 3/8
    • Discuss
    • 6. 
      The product of two alternate odd integers exceeds three times the smaller by 12. What is the larger integer?

    • Options
    • A. 9
    • B. 7
    • C. 3
    • D. 5
    • Discuss
    • 7. 
      The sum of two numbers is 24 and their product is 143. The sum of their squares is

    • Options
    • A. 296
    • B. 295
    • C. 290
    • D. 228
    • Discuss
    • 8. 
      If P = (0.08) 2, Q = 1/(0.08) 2 and R = (1 ? 0.08) 2 ? 1, then out of the following the true relation is

    • Options
    • A. Q < P and P = R
    • B. P < Q and P = R
    • C. Q < R < P
    • D. R < P < Q
    • Discuss
    • 9. 
      If (5x2 ? 3y2) : xy = 11 : 2, then the positive value of
      x
      is :
      y

    • Options
    • A. 7 2
    • B. 5 2
    • C. 3 2
    • D. 5 3
    • Discuss
    • 10. 
      If a3 ? b3 = 56 and a ? b = 2, then the value of ( a2 + b2 ) is :

    • Options
    • A. ? 10
    • B. ? 12
    • C. 20
    • D. 18
    • Discuss


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