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একটি সংখ্যা যখন 50% বৃদ্ধি করা হয়, তখন 2580 হয়। সংখ্যাটি হল:

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RPF Constable 2024 Official Paper (Held On 03 Mar, 2025 Shift 2)
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  1. 860
  2. 1720
  3. 3440
  4. 5160

Answer (Detailed Solution Below)

Option 2 : 1720
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More Percentage Questions

Q1.A is 20% more than B. B is 25% less than C. Find the ratio between A and C?
Q2.A scores 4 marks less than B, B got 12 marks less than passing marks. A’s marks is 80% of the passing marks. Find the marks scored by B.
Q3.If population of a town in year 2022 is 4520 and the population of same town is 5650 in the year 2023. Find the percentage increase in population.
Q4.If 20% of 320 is x less than 40% of 460, find x?
Q5.Kalpana and Sudha got 650 and 546 marks respectively in an examination. If Kalpana scored 50% marks, then what is the percentage of marks scored by Sudha?
Q6.The population of a town increases by 16% each year. If the population at the beginning of this year is 18,750, what will the population be at the end of next year?
Q7.A number when increased by 50%, gives 2580. The number is:
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Q9.Reducing a number by 12% gives 3850. What is the number?
Q10.60% of 65 is how much more than \(\frac{4}{5}\) of 15?
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More Quantitative Aptitude Questions

Q1.Perimeter of a rectangular field is equal to the perimeter of a triangular field whose sides are in the ratio 3:2:4 respectively. lf area of rectangular field is 500 m2 and sides are in the ratio 5:4 respectively, then calculate the longer side of the triangular field.
Q2.A cistern has an inlet pipe and an outlet pipe. Inlet pipe can fill three-fourth of the cistern in 24 minutes while outlet pipe can empty the one-third filled cistern in 16 minutes. If both the pipes are opened together, then the cistern will be completely filled in-
Q3.In a family, three sons were born for every 3 years one after the other. If the ratio of present ages of father and the eldest son is 15:7 and the average of the present ages of the 3 sons is 18 years. What will be the ratio of the ages of the father and the youngest son after 5 years?
Q4.Train A of length 80m while moving crosses a pole in 16 seconds. lf it is known that the lengths of train B and train A is in the ratio of 3:1, then how long would it take train B to cross a platform which is half the length of train A if the speed of train B is same as that of train A?
Q5.Can A and Can B contain a mixture of soda and water in the ratio of 5 : 3 and 7 : 2 respectively If soda and water are taken out in the ratio of P : Q from can A and B respectively to form a new mixture in which the ratio of soda and water is 12 : 5 respectively, then find the value Of P:Q?
Q6.A boat can covers a certain distance in upstream and same distance in downstream in total of 7 hours 48 minutes, If upstream speed of the boat is 62.5%. of downstream speed of the boat and speed of the stream is 3 km/h, what is the total distance covered by the boat?
Q7.M and R went for shopping and bought two sarees each at different cost. Cost price of saree bought by R is Rs.250 more than the cost price of saree bought by M. Shopkeeper earned a profit of 20% on selling both the sarees together to R and M which he bought them at total Rs.6000. At what cost did M buy saree?
Q8.There are three numbers m, n, and p, such that sum of m and n is 144, sum of thrice of n and five times of p is 464, and sum of p and m is 160, then what is the value of p?
Q9.While calculating average marks of 60 students, the two digits of original marks of a student are written reversed and thereby average of marks is increased by 0.6 Find the difference between the two digits of marks of the student?  
Q10.Simple interest received on a certain sum at a rate of simple interest of 5% for 2 years is Rs.780. If the rate of interest remains same, what will be the total amount at the time of withdrawal at the end of 5 years.  
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