SIBL Probationary Officer Exam Question Solution 2021

Question Solution

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SIBL Probationary Officer Exam Question Solution 2021

Post Name:

1. Probationary Officer (PO)

Exam Date: 12 March 2021
Exam Time: 10.00 AM to 11.30 AM


Section: B (Mathematics)  

17. [{(√2-1)/ (√2+1)} /{(√2+1)/ (√2-1)}] / [{(√3-1)/ (√3+1)} /{(√3+1)/ (√3-1)}] =? Ans: 3/2 

18. 212+ 212 +212 +212 =? Ans: 2^14 

19. Bilkis invested Tk. 2400 in the XYZ Bank at 5%. How much additional money must the she invests at 8% so that total annual income will be equal to 6% of her entire investment? Ans: 1200 

20. Anita had to do a multiplication. Instead of taking 35 as one of the multipliers she took 53. As a result, the product went up by 540 what is the new product? Ans: 1590 

21. Rina and Shila entered into a partnership with their capital in the ratio 5:6. At the end of 8 month, Rina withdraws her capital. If they receive the profit in the ratio of 5:9, find how long Shila’s capital was used? Ans: 12 Months 

22. A class starts at 10:00 a.m. and lasts till 1:30 p.m. Four periods are held during this interval. After every period, 10 minute are given free to the students. What is the exact duration of each period? Ans: 45 Minutes 

23. A shopper spends Tk.100 purchase CDs at Tk.20 each. The next day, the disks go on sale for taka 16 each and the shopper spends Tk.2400 to purchase more CDs. What was the average price per disk purchased? Ans: 17  

24. A salesman receives daily wages of Tk.250 and earns commission of 15% on all sales he makes. How much taka worth of sales does he need to make in order to bring his total daily income of taka 1000? Ans: 5000 

25. In a club 60% members are male and 70% members are graduates. Also 50% of the graduate member are male. What percentage of the club members are female and non graduate? Ans: 5% 

26. Pooja is twice as efficient as Aarti and takes 90 days less than Aarti to complete the job. Find the time in which they can finish the job together? Ans: 60 days 

27. Mamun bought 50 shares at Tk.60, and 2 months later, he purchased 25 shares at Tk.56. At what price should he purchase 25 additional shares in order to have an average price of Tk.58 Per share? Ans: 56 

28. The total income of Habib in 2017, 2018 and 2019 was Tk.36400. His income increased by 20% each year. What was his income in 2019? Ans: 14400 

29. A person’s present age is two-fifth of the age of his mother. After 8 years, he will be one half of the age of his mother. What is the present age of the mother? Ans: 40 

30. The measurement of a rectangle is 16 feet by 12 feet. What is the area of the smallest circle that can cover the rectangle entirely (so that no part of the rectangle is outside the circle)? Ans: 5 

31. The perimeter of a square is equal to the perimeter of a rectangle whose length and width are 6m and 4m respectively. The site of the square is. Ans: 100 π 

32. In the figure DE is parallel to BC. If the area of a triangle ADE is half that of trapezoid DECB. what is the ratio of AE to AC?  Ans: 1 : 



SIBL Probationary Officer Exam Question Solution 2021

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