511 . Working alone Abu can finish a job in 40 days. Labu can do the same job in 60 days working alone. They start working together and work for 18 days. Then Harun joined them. The three men working together finished the job in 5 more days. In how many days could Harun finish the job working alone?
  • A. 120
  • B. 80
  • C. 72
  • D. 96
  • E. None of them
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512 . X, Y & Z has started a business with a profit sharing ratio 7:8:9. If at the end of the year, Y gets a total of Taka 4,000, what will be Z's profit?
  • A. Tk. 4500
  • B. Tk. 4000
  • C. Tk. 3500
  • D. Tk. 5500
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সমন্বিত ৫ ব্যাংক | অফিসার ক্যাশ | 25-03-2022 ||
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513 . X, Y and Z can do a piece of work in 6 hours. X and Y can do the same work in 8 hours and Z can the same work in 12 hours . In how many times will X and Z do the same work?
  • A. 6 hours
  • B. 8 hours
  • C. 10 hours
  • D. 12 hours
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Officer (General) -Ansar VDP Unnayan | BD House Building Finance Corporation 28.09.2018
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514 . x2+x-20 এর উৎপাদক কোনটি

  • A. x-5+x+4
  • B. x+5+x-4
  • C. x+4+x-5
  • D. x-4+x-5
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বাংলাদেশ ডাক বিভাগ (মেট্রোপলিটন সার্কেল) পরিদর্শক-১৩.০৫.২০১৬
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515 . x2+x−20=?
  • A. (x-5)(x+4)
  • B. (x+5)(x-4)
  • C. (x-10)(x-2)
  • D. (x-10)(x+2)
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516 . x3<x2<x, then the value of x could be

  • A. 0
  • B. 1
  • C. 1/3
  • D. 2
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Bangladesh Bank - Assistant Director - 2010
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517 . x=-4,-2,1,3 y=-1,4,5 If x is a number from set X, and y is a number from set Y. The probability that x + y is positive is closest to

  • A. 0.5
  • B. 0.6
  • C. 0.7
  • D. 0.8
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Global Islami Bank || Probationary Officer (10-02-2024) || 2024
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518 . y2-15y+56=0, then y=?

  • A. -5 & 6
  • B. -7 & 8
  • C. 6 & 9
  • D. 7 & 8
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সমন্বিত ৫ ব্যাংক | অফিসার ক্যাশ | 25-03-2022 ||
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519 . You are lookng at a billboard 40m away with an angle of elevation of 30°30°. At what height is the billboard?
  • A. 20
  • B. 30
  • C. 40
  • D. 50
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জাতীয় নিরাপত্তা গোয়েন্দা সংস্থা-(NSI) Assistant Director- Research officer &amp- Assistant Programmer-০৮/১০/২০২১
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520 . You have saved 135 Taka by purchasing a blanket with15% discounton it. What is the quoted price of the blanket in Taka?
  • A. 467
  • B. 900
  • C. 767
  • D. 1080
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সমন্বিত ৮ ব্যাংক | অফিসার | 21-01-2022
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521 . You need to plant three along the perimeter of a rectangle whose width is 20 ft and length 60 ft. The distence between each plant should be 5 ft. How many trees will you need?
  • A. 33
  • B. 34
  • C. 35
  • D. 31
  • E. 32
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522 . y²-15y +56=0, then y=?
  • A. -5 & 6
  • B. -7 & 8
  • C. 6 & 9
  • D. 7 & 8
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523 .  A club has 8 male & 8 female members. The club is choosing a committee of 6 members. The committee must have 3 male & 3 female members. How many different committees can be chosen?  

  • A. 720
  • B. 112
  • C. 9
  • D. 3136
  • E. 112896
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524 .  A dealer sells a Radio at a gain of 10%. If he had bought it at 10% less and sold it for Tk.132 less. He would have still gained 10%. The CP of the Radio is--
  • A. 1320
  • B. 1400
  • C. 1188
  • D. 1200
  • E. 1360
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525 .  A line segment is drawn from point (8, -2) to point (4,6). The coordinates of the mid point of this line segment are--
  • A. (12, 4)
  • B. (12, 8)
  • C. (6, 4)
  • D. (6,2)
  • E. None of these
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