3901 . If b + a = x and a - b = y, then a2 - b2 =
  • A. (x2 - y2)/2
  • B. (x2 - y)/2
  • C. 2xy
  • D. xy/2
  • E. xy
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3902 . If an investor gets Tk. 19500 as interest after 5 years on his savings of Tk. 13,000. what is the rate of interest ?
  • A. 8%
  • B. 5%
  • C. 10%
  • D. 30%
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Senior Officer (IT) - Sonali-Janata-BD Krishi-BD Development Bank Ltd - 30.11.2018
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3903 . If a:b=4 and b:c=5 than a:b:c=?
  • A. 8: 15: 12
  • B. 20: 35: 42
  • C. 20: 35: 24
  • D. None
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বাংলাদেশ ব্যাংক || সহকারী পরিচালক 28-10-2022
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3904 . If a:b=1:3, b:c=5:7 then what is the value of a:b:c?
  • A. 3:5:7
  • B. 5:9:15
  • C. 5:15:21
  • D. 4:13:24
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3905 . If a cube has a length of 8 cm , what is its total surface area?
  • A. 64
  • B. 96
  • C. 384
  • D. 256
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Senior Officer (IT) - Sonali-Janata-BD Krishi-BD Development Bank Ltd - 30.11.2018
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3906 . If A can do 1 /4 of a work in 3 days and B can do 1 /6 of the same work in 4 days , how much will A get if both work together and are paid Tk. 180 in all ?
  • A. Tk. 60
  • B. Tk. 120
  • C. Tk. 90
  • D. Tk. 180
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Officer (General) -Ansar VDP Unnayan | BD House Building Finance Corporation 28.09.2018
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3907 . If a books bought at prices ranging from Tk.200 to Tk.350 are sold at prices ranging from Tk.300 to Tk.425. What is the greatest possible profit that might be made in selling books?
  • A. 600
  • B. 400
  • C. 450
  • D. 500
  • E. 1800
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3908 . If A and B together can complete a work in 18 days, A and C together in 12 day and B and C together in 9 days, then B alone can do the work in -
  • A. 24 days
  • B. 18 days
  • C. 30days
  • D. 40 days
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অফিসার (ক্যাশ ) - Sonali | Rupali | BD Krishi | Rajshahi Krishi Unnayn | Investment Corporation Of Bangladesh - ২৯. ০৩.২০১৯
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3909 . If A and B are in the ratio 3 : 4 and B and C in the ratio 12 :13 then A and C will be in the dratio-
  • A. 3 :13
  • B. 36 : 13
  • C. 13 : 9
  • D. 9 : 13
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অফিসার (ক্যাশ ) - Sonali | Rupali | BD Krishi | Rajshahi Krishi Unnayn | Investment Corporation Of Bangladesh - ২৯. ০৩.২০১৯
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3910 . If A = { 1,2,3} And B = { 1, 2,5} then A -B .
  • A. {1}
  • B. {5}
  • C. {3}
  • D. {2}
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Senior Officer (IT) - Sonali-Janata-BD Krishi-BD Development Bank Ltd - 30.11.2018
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3911 . If a 10% deposit that has been paid toward the purchase of a cetain goods is tk.110, how much Taka remains to be paid?
  • A. 880
  • B. 1100
  • C. 1010
  • D. 990
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3912 . If a + b = √5 and a - b = √3, then a2 + b2 =?
  • A. √8
  • B. 6
  • C. 4
  • D. 4√2
  • E. 8
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3913 . If 62 =34 + 4x. what is x ?
  • A. x =16
  • B. x = -16
  • C. x =7
  • D. x =5
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Senior Officer (IT) - Sonali-Janata-BD Krishi-BD Development Bank Ltd - 30.11.2018
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3914 . If 6 men and 8 boys can do a piece of work in 10 days and 26 men and 48 boys can do the same in 2 days , the time taken by 15 men and 20 boys to do the same type of work will be
  • A. 4 days
  • B. 5 days
  • C. 6 days
  • D. 7 days
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Sonali &amp-Janata Bank | Officer (IT)| 04.01.2019
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3915 . If 6.4 is 80 percent of 20 percent of a certain number, what is the number/
  • A. 9
  • B. 36
  • C. 40
  • D. 81
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