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Home Aptitude Linear Equation Comments

  • Question
  • The cost of 21 pencil and 9 clippers is ? 819. What is the total cost of 7 pencils and 3 clippers together?


  • Options
  • A. ? 204
  • B. ? 409
  • C. ? 273
  • D. ? 208

  • Correct Answer
  • ? 273 

    Explanation

    Let cost of 1 pencil and 1 clipper be p and c, respectively.
    Now, according to the question,
    21p + 9c = ? 819
    ? 3(7p + 3c) = ? 819
    ? 7p + 3c = ? 273
    Cost of 7 pencil and 3 clippers = ? 273


  • Linear Equation problems


    Search Results


    • 1. 
      If (x/4) + (y/3) = 10/24 and (x/2) + y = 1, then the value of x + y is

    • Options
    • A. 1
    • B. 3/2
    • C. 2
    • D. 4
    • Discuss
    • 2. 
      The numerator of a fraction is 6x + 1 and the denominator is 7 - 4x, x can have any value between -2 and 2, both included. The values of x for which the numerator is greater

    • Options
    • A. 3/5 < x ? 2
    • B. 3/5 ? x ? 2
    • C. 0 < x ? 2
    • D. -2 ? x < 2
    • Discuss
    • 3. 
      The sum of the two digits is 15 and the difference between them is 3. What is the product of the digits?

    • Options
    • A. 56
    • B. 63
    • C. 42
    • D. Cannot be determined
    • Discuss
    • 4. 
      Deepak has some hens and some goats. If the total number of animal heads is 90 and the total number of animal feet is 248, what is the total number of goats Deepak has?

    • Options
    • A. 32
    • B. 36
    • C. 34
    • D. Cannot be determined
    • Discuss
    • 5. 
      solve 6x + 3y = 7xy and 3x + 9y = 11xy.

    • Options
    • A. x=1, y=3/2
    • B. x=-1, y = 3/2
    • C. x=3/2, y=1/2
    • D. x=1, y= -3/2
    • Discuss
    • 6. 
      The value of k for which kx + 3y - k + 3 = 0 and 12x + ky = k, have infinite solutions, is

    • Options
    • A. 0
    • B. -6
    • C. 6
    • D. 1
    • Discuss
    • 7. 
      In an examination, a student scored 4 marks for every correct answer and losses 1 mark for every wrong answer. A student attempted all the 200 question and scores 200 marks. Find the number of questions, he answer correctly.

    • Options
    • A. 82
    • B. 80
    • C. 68
    • D. 60
    • Discuss
    • 8. 
      The sum of third , fourth and fifth part of a number exceeds half of the number by 34. Find the number?

    • Options
    • A. 60
    • B. 120
    • C. 30
    • D. None of these
    • Discuss
    • 9. 
      Krishna has some hens and some goats. If the total number of animal heads are 81 and the total number of animal legs are 234. How many goats does Krishna have?

    • Options
    • A. 45
    • B. 24
    • C. 36
    • D. can be determined
    • Discuss
    • 10. 
      The age of the father 5 years ago was 5 times the age of his son. At present the father's age is 3 times that of his son . What is the present age of the father?

    • Options
    • A. 33 years
    • B. 30 years
    • C. 45 years
    • D. None of these
    • Discuss


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