logo

CuriousTab

CuriousTab

Discussion


Home Aptitude Simplification See What Others Are Saying!
  • Question
  • Two numbers are such that the sum of twice the first number and thrice the second number is 36 and the sum of thrice the first number and twice the second number is 39. Find the difference between the numbers?


  • Options
  • A. 15
  • B. 3
  • C. 9
  • D. 6

  • Correct Answer
  • 15 

    Explanation

    Let the required two numbers be a, b

    From the given data,

    2a + 3b = 36 .....(1)

    3a + 2b = 39 .....(2)

    Now, by solving 1 and 2 eqnts, we get

    5a = 45

    a = 9 ....(3)

    Put (3) in (1), we get

    2(9) + 3b = 36

    => 18 + 3b = 36

    3b = 36 - 18

    => b = 18/3 = 6

     

    Required, difference between the numbers = a + b = 9 + 6 = 15.

  • Tags: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO

    More questions

    • 1. 64, 71, 80, 91, 104, 119, 135, 155

    • Options
    • A. 71
    • B. 80
    • C. 104
    • D. 119
    • E. 135
    • Discuss
    • 2. 15, 16, 34, 105, 424, 2124, 12756

    • Options
    • A. 16
    • B. 34
    • C. 105
    • D. 424
    • E. 2124
    • Discuss
    • 3. 196, 169, 144, 121, 100, 80, 64

    • Options
    • A. 169
    • B. 144
    • C. 121
    • D. 100
    • E. 80
    • Discuss
    • 4. 
      What time will be taken by a boat to cover a distance of 128 km along the stream, if speed of a boat in still water is 24 km/h and speed of stream is 8 km/h?

    • Options
    • A. 8 km/h
    • B. 4 km/h
    • C. 7 km/h
    • D. 6 km/h
    • Discuss
    • 5. 
      A boat goes 12 km in 1 h in still water. It takes thrice time in covering the same distance against the current. Find the speed of the current.?

    • Options
    • A. 8 km/h
    • B. 12 km/h
    • C. 6 km/h
    • D. 7 km/h
    • Discuss
    • 6. 
      A boat travels upstream from B to A and downstream from A to B in 3 hours. If the speed of the boat in still water is 9km/hr and the speed of the current is 3 km/hr the distance between A and B is?

    • Options
    • A. 4 km
    • B. 6 km
    • C. 8 km
    • D. 12 km
    • Discuss
    • 7. 
      If the first day of June is Saturday, them the date on which the last Saturday of that month falls, is?

    • Options
    • A. 22
    • B. 28
    • C. 29
    • D. 30
    • Discuss
    • 8. 
      A boat goes 48 km downstream in 20 h. It takes 4 h more to cover the same distance against the stream. What is the speed of the boat in still water?

    • Options
    • A. 2.2 km/h
    • B. 2 km/h
    • C. 4 km/h
    • D. 4.2 km/h
    • Discuss
    • 9. 
      If the probability that A will live 15 yr is 7/8 and that B will live 15 yr is 9/10, then what is the probability that both will live after 15 yr?

    • Options
    • A. 1/20
    • B. 63/80
    • C. 1/5
    • D. None of these
    • Discuss
    • 10. 
      Keshav can row 60 km downstream and 36 km upstream, taking 10 h each time. What is the velocity of the current?

    • Options
    • A. 3 km/h
    • B. 2. 2 km/h
    • C. 4 km/h
    • D. 1.2 km/h
    • Discuss


    Comments

    There are no comments.

Enter a new Comment