Explanation:

৩০০০ এর শতকরা ৫ ভাগ অপেক্ষা ৩০০০ এর শতকরা ১০ ভাগ কত বেশি? সঠিক উত্তর ১৫০ 3000 এর শতকরা 5 ভাগ = 1503000 এর শতকরা 10 ভাগ = 300অতএব, 300 - 150 = 150 বেশি

Explanation:

ছোয়াদ সাহেব ৩০০ টাকার বই কিনলেন। দোকানদান তাকে ১৯২% কমিশন দিলেন। তিনি কত টাকা কমিশন পেলেন? সঠিক উত্তর ২৮.৫ টাকা সোয়াদ সাহেব 100 টাকায় কমিশন পেলেন 192টাকাঅতএব তিনি 300 টাকায় কমিশন পেলেন =19×32=572=28.5 টাকা

Explanation:

A school has a total of 90 students. There are 30 students taking Physics, 25 taking English, and 13 taking both. Approximately what percentage of the students is taking either Physics of English? Correct Answer 47 % Students taking physics = 30 (these 30 include those 13 that take both)Students taking english = 25 (these 25 also include those 13)So those that take either physics or english or both = 30 + 25 - 13 = 42.Required percentage = 42/90 * 100 = 47% approx

Explanation:

In 10 years, A will be twice as old as B was 10 years ago. If A is now 9 years older than B, then the present age of B is Correct Answer 39 years Let, B's present age is x year & 10 years ago he was (x-10) After 10 years, A= 2((x-10),  B= (x+10)Now, 2(x+10)-(x+10)=9Or, x=39 years.

Explanation:

A natural number when increased by 12, equals 160 times reciprocal. The number is- Correct Answer 8 Step 1: Construct the equation based on given condition.let the required natural number be x.According to the question,x+12=160/xOn multiplying by x on both sides, we getx^2+12x−160=0,step 2: Find roots using factorization.By splitting the middle term, we get :⇒x^2+(20x−8x)−160=0⇒x^2+20x−8x−160=0⇒x(x+20)−8(x+20)=0⇒(x+20)(x−8)=0⇒x=8[x≠−20 because it is not a natural number]hence, the required natural number is 8

Explanation:

জ্বালানি তেলের মূল্য ১৫% বৃদ্ধি পাওয়ায় বাসের টিকিটের মূল্য ২০% বৃদ্ধি পেল। তাহলে নতুন ও পুরানো বাস ভাড়ার অনুপপাত কত? সঠিক উত্তর ৬ : ৫ ধরি, পুরনো বাস ভাড়া =১০০তাহলে ২০% বৃদ্ধিতে নতুন বাস ভাড়া = ১২০ প্রশ্নমতে,নতুন ভাড়া : পুরাতন ভাড়া ১২০ : ১০০৬:৫

Explanation:

৮ জন লোক একটি কাজ ১২ দিনে করতে পারে। দুই জন লোক কমিয়ে দিলে কাজটি সম্পন্ন করতে শতকরা কত দিন বেশি লাগবে? সঠিক উত্তর ৩৩১৩ ২ জন কমালে লোক সংখ্যা= ৮ - ২ = ৬ জন।৮ জনে কাজটি করতে পারে ১২ দিনেসুতারাং, ৬ জনে কাজটি করতে পারে = ১২ × ৮/৬ = ১৬ দিনে। সময় বেশি লাগলো = ১৬ - ১২ = ৪ দিন১২ দিনে সময় বেশি লাগলো ৪ দিনসুতারাং, ১০০ দিনে বেশি লাগলো = ৪/১২× ১০০ = ৩৩.৩৩ দিন।উত্তর: শতকরা ৩৩.৩৩ দিন বেশি লাগবে।

Explanation:

15 টাকা 25 টাকার শতকরা কত? সঠিক উত্তর 60% 25 x P = 15 :. P = (15 × 100)/25 = 60%

Explanation:

কোন সংখ্যার ৩৭% হতে ৩৭ বিয়োগ করলে বিয়োগফল ৩৭ হবে? সঠিক উত্তর ২০০ x এর  ৩৭/১০০ -৩৭  =৩৭ => ৩৭x/১০০ = ৭২=> ৩৭x = ৭২ × ১০০ => ৩৭x = ৭২০০x = ২০০

Explanation:

কোন দেশের স্থুল জন্মহার ২৫ এবং স্থল মৃত্যুহার ১০ হলে জনসংখ্যা বৃদ্ধির শতকরা হার কত? সঠিক উত্তর ১.৫% {(25-10)/1000}×100 = 1.5%

Explanation:

In a class, 120 students are male and 100 students are female. 25% of male students and 20% of female students are engineering students. 20% of the male engineering students and 25% of the female engineering students passed the final exam. What percentage of engineering students passed the exam? Correct Answer 22% Total Engineering student (female 120 × 0.25 = 30 + male 100 × 0.20 = 20) =50  In total   engineering passed student of (female 30 × 0.20 = 6 + male 20 × 0.20=5) = 11  Percentage passed student 11/50 × 100= 22

Explanation:

৫-এর কত শতাংশ ৭ হবে------ সঠিক উত্তর ১৪০ ধরি, নির্ণেয় শতাংশ = x প্রশ্নমতে, ৫ এর x% = ৭ = > ৫ এর x100 = 7 = >x = ৭×১০০৫.·. x = ১৪০

Explanation:

২-এর কত শতাংশ ৮ হবে? সঠিক উত্তর ৪০০ ধরি ২ এর x % ৮ হবে। অতএব ২ এর x১০০ = ৮ = > ২x  = ৮×১০০.·. x  =  400

Explanation:

If 18 is 15 percent of 30 percent of a certain number , what is the number ? Correct Answer 9 কম্পিটারের নির্ভুলভাবে দ্রুত কাজ করা এবং স্মৃতি সংরক্ষণের ক্ষমতা রয়েছে । তবে শুধু উন্নত মস্তিক ও জৈবিক বৈশিষ্ট্যসম্পন্ন প্রাণীরই বুদ্ধি বিবেচনার ক্ষমতা রয়েছে, যা কোনো যন্ত্রের নেই ।

Explanation:

Number 29 is 10 percent of what number ? Correct Answer 87 10% of 290 is 29

Explanation:

একজন লোক একটি নির্দিষ্ট স্থান A থেকে যাত্রা শুরু করে ১২ কিলোমিটার উত্তর দিকে গেল এং সেখান থেকে ৫ কিলোমিটার পূর্ব দিকে গেল। যাত্রা শেষে সে A অবস্থান থেকে কত দূরে থাকবে? সঠিক উত্তর ১৩ কি. মি. ∴ A অবস্থান থেকে দূরত্ব AC = AB2 + BC2 = (12)2 + (5)2 = 144 + 25 = 169.'. AC = ১৩  কিমি.

Explanation:

The price of corn rose 20% two years ago and 15% last year . what is the combined percent increase in price ? Correct Answer 5% Combined Percent = p + q + pq/100 = 20 + 15 + ( 20 × 15/100) = 38%

Explanation:

If the length and width of a rectangule garden plot were each increased by 20% , what would be the percent increase in the area of plot ? Correct Answer 20% Let, Length of rectangle garden x and width of rectangle garden y. area = xy New length = x + 20/100x = 1.2x New width = y + 20/100 y = 1.2y New area = 1.2x × 1.2y = 1.44xy % increase in area = 1.44xy - xy /xy ×100% = 44%

Explanation:

75% of students of a class answered Question No. 1 correct and 55% answered Question No. 1 correct and 20% answered neither question correctly . What percent of students answered both question correctly ? Correct Answer 20% Students answer Q.1 or Q.2 or both correctly = ( 100 - 20) = 80% Let, x% students answered both correctly ( 75 - x) + ( 55 - x) + x = 80 130 - x = 80 x = 50

Explanation:

In a group of people solicited by a charity, 30% contributed TK. 40 each, 45% contributed TK. 20 each and the rest contributed TK. 12 each. What percentage of the total amount came from people who gave TK. 40 each ? Correct Answer 25% Let, total participant = 100 30% contributed = 40×30% = 40×30/100 = 12 Tk. 45% contributed = 20 × 45 % = 20×45/100 = 9 Tk. Test = { 100 - ( 30 + 45) }% = 25% contributed = 12×25/100 = 3 Tk. The percentage of total amount came from people who gave Tk 40 each = 12 /( 12 + 9 + 3) ×100 = 50%

Explanation:

একজন ব্যক্তি একটি বর্গক্ষেত্র জুড়ে আড়াআড়িভাবে হেঁটে গিয়েছিল। প্রান্ত বরাবর না হাঁটার কারণে কত শতাংশ কম হাঁটতে হয়েছিল? সঠিক উত্তর ২০% ধরি, বর্গক্ষেত্রের একবাহুর দৈর্ঘ্য ক। তাহলে, বর্গক্ষেত্রের কর্ণের দৈর্ঘ্য (√২)ক। বর্গক্ষেত্রের এক কোণা থেকে বিপরীত কোণায় পৌঁছতে প্রান্ত বরাবর হাঁটতে হবে (ক + ক = ২ক) একক এবং আড়াআড়িভাবে বা কর্ণ বরাবর হাঁটতে হবে (√২)ক একক। সুতরাং, আড়াআড়িভাবে কম হাঁটতে হবে = {(২ক - √২ক) / ২ক} x ১০০% = ২৯.২৯%

Explanation:

একটি পরীক্ষায় ৬০% গণিতে এবং ৭০% ইংরেজিতে পাস করে। উভয় বিষয়ে ১৫% ফেল করলে উভয় বিষয়ে পাস করে- সঠিক উত্তর ৪৫% ব্যাখ্যাঃ গণিতে ফেল করে = (১০০ - ৬০)% = ৪০% শুধু " " " = (৪০ - ১৫)% = ২৫% ইংরেজিতে ফেল করে = (১০০ - ৭০)% = ৩০% শুধু " " " = (৩০ - ১৫)% = ১৫% এক ও উভয় বিষয়ে ফেল = (২৫ + ১৫ + ১৫)% = ৫৫% উভয় বিষয়ে পাশ করে = (১০০ - ৫৫)% = ৪৫%

Explanation:

৫১ কোন সংখ্যার ৬০%? সঠিক উত্তর ৮৫ মনে করি, সংখ্যটি, ক ক এর ৬০% = ৫১ ক × ৬০/১০০ = ৫১ ক = ৫১ × ১০০/৬০ ক = ৮৫

Explanation:

If 20 percent of 80 percent of a number is 12.8, then what is the number ? Correct Answer 80 Let, the number is xAccordingly, 20%× 80% × x = 12.8⇒ x = (128 × 100 × 100)/(20 × 80 × 10)= 80

Explanation:

একটি আয়তক্ষেত্রের দৈর্ঘ্য ২০% বৃদ্ধি এবং প্রস্থ ১০% হ্রাস করা হলে, এর ক্ষেত্রফলের শতকরা কত পরিবর্তন হবে? সঠিক উত্তর ৮% বৃদ্ধি ক্ষেত্রফলের পরিবর্তন = ২০ - ১০ + ( ২০ × - ১০) /১০০ = ৮% বৃদ্ধি

Explanation:

A class of 20 girls and 30 boys arranged a picnic. However, only 30% of the girls and 40% of the boys attended the picnic. What percent of the class attended the picnic? Correct Answer 36 No. of girls attended picnic = 20 × 30% = 6 No. of boys attended picnic = 30×40% = 12 % of students attended picnic = 18/50 × 100% = 36 %

Explanation:

At a certain store, a chair was on sale for Tk. 5000. As the manager thought he could get more money for the chair, he increased its price by 8 percent. After a week the chair had not been sold. The manager then reduced the last price by 10%, and the chair was sold. For how much was the chair sold? Correct Answer 4860 After 8% increase new price = tk. 5000×108/100 = Tk.5400 Again after 10% reduction on last price, new price = Tk.5400 × 90/100 = Tk.4860

Explanation:

Faruk can complete a task in 20 days. He gets 2 assistants- each of whom can work 1/2 as fast as he does. If all of them work together for 5 days, what percentage of the task will be completed? Correct Answer 50% This can be done easily by the following way. যেহেতু ফারুকের দুই. Assistant তার সমান কাজ করবে ( 1/2 each), so total কাজ করতে তিনজনের মোট 20/2 = 10 দিন লাগবে। So 5 days এ 50% কাজ হবে।

Explanation:

If 25% of a number is subtracted from a second number, the second number reduces to its five-sixth .What is the ratio of the first number to the second number ? Correct Answer 2:3 A = First Number B = Second Number B - 1/4A = 5/6B B = 1/4A + 5/6B 1/6B = 1/4A 4B = 6A 2B = 3A 2/3B = A A:B = 2:3

Explanation:

In a book store, the sales of a book decreased by 80% from 2007 to 2008. If the sales in 2009 were the same as in 2007, would be the percentage increase in sales from 2008 to 2009? Correct Answer 80% let, in 2007 was = 100 ,, 2008 ,, = 20 ,, 2009 ,, = 100 increase percentage = ( 100 - 20/20) = 400% (answer)

Explanation:

একটি নতুন বাইসালেকেলর দাম ২,৫০০ টাকা । প্রতি বছর শেষে সাইকেলটির মূল্য পূর্বতন মূল্যের ৪/৫ এ দাঁড়ায় । ৩য় বছর শেষে সাইকেলটির মূল্য কত হবে? সঠিক উত্তর ১,২৮০ টাকা একটি নতুন বাইসাইকেলের দাম ২৫০০ টাকা। প্রতি বছর শেষে সাইকেলটির মূল্য পুরাতন মূল্যের ৪/৫ এ দাঁড়ায়। তাহলে প্রথম বছর দাম = (২৫০০ এর ৪/৫) = ২০০০ টাকা ২য় বছর দাম = (২০০০ এর ৪/৫) = ১৬০০ টাকা ৩য় বছর দাম = (১৬০০ এর ৪/৫) = ১২৮০ টাকা

Explanation:

A merchant was selling an item at a certain price, then marked it down 20% for spring sale. During the summer, he marked the item down another 20% from its spring price. If the item was sold at the summer price, what percent of the original price did it sell for? Correct Answer 64% Let the original price of the item was Tk. 100 Discount offered for spring sale = 20% Therefore, the selling price of the item in the spring = 100 - 20 = 80 tk The merchant gives another 20% discount on this for summer season Therefore, the selling price in the summer season = 80 - 80 × 20/100                                                                                     = 80 - 16 = 64 tk Now, selling price/Original price = 64/100 = 64% Therefore, the selling price is 64% of the original price.

Explanation:

In a certain fashion house, which has four sizes of a specific shirt, there is one-third as many small shirts as medium shirts, and 1/2 as many large shirts as small shirts. If there are as many X-large shirts as large shirts, what percent of the shirts in the store are medium? Correct Answer 60% Let, the parcent of medium shirts be M. Then, the parcent of small shirts = M/3 The parcent of large shirts = (1/2) x M/3 = M/6 The parcent of X - large shirts = M/6 Now,  M = 1 - (M/3 + M/6 + M/6) = 1 - 2M/3 or,   M + 2M/3 = 1 or,   5M/3 = 1 or,   M = 3/5 So,   M = (3/5) x 100% = 60%

Explanation:

From 7 : 00 AM to 11:00 AM it rained 2.25 inches. At 11:00 AM the rain increased ti fall at a rate of 1.25 inches every two hours. How many inches of rain landed on the ground by 5:00 PM? Correct Answer 6 inches   Given, From 7:00 AM to 11:00 AM it rained 2.25 inches here, 11AM - 5PM = 6 hrs rainfall increased 1.25 every 2 hrs so,rainfall increased 6/2 = 3 times  rainfall from 11am - 5pm = 3*1.25 = 3.75 inches total rain = 2.25 + 3.75 = 6 inches (ans)

Explanation:

The length of rectangle is increased by 20% and the width is decreased by 20% . What is the percentage increase or decrease of the area of the rectangle . Correct Answer decreased by 20% We can let L = the original length and W = the original width  Thus, the original area of the rectangular is LW and the new area is 1.2L× 0.8W = 0.96LW So, the area is decreased by 4%

Explanation:

In the Excel Manufacturing Company, 46 percent of the employees are men. If 60 percent of the employees are unionized and 70 percent of them are men, what percent of the non-unionized workers are women? Correct Answer 90% Lets say there are total 100 employees Then men = 46 & women = 54 Unionized Emp = 60 & non unionized emp = 40 Men Unionized = .7 * 60 = 42 Women Unionized = 18 Women non - unionized = 54 - 18 = 36 Percentage of Women non unionized = 36/40 * 100 = 90% ans: 90%

Explanation:

A 5% monthly salary increase resulted in a salary increase of Tk. 6,000 per year for an employee. what was her monthly salary before the increase? Correct Answer Tk. 12,00 মাসিক ৫% বৃদ্ধির পর ১২ মাসে মোট বৃদ্ধি পায় ৬০০০ টাকা সুতরাং এক মাসে বৃদ্ধি পাবে ৬০০০/১২ = ৫০০ টাকাধরি তার মাসিক বেতন 'ক' টাকাশর্তমতে    ক এর ৫%=৫০০=>ক = (৫০০*১০০)/৫=> ক =১০,০০০ টাকা।সুতরাং তার পূর্বের বেতন ১০ হাজার টাকা।

Explanation:

a salesman usually makes 25% profit on every radio he sells. During a sale, he reduces his profit margin to 20% while his sales increase by 10% what is the ratio of this new profit to his usual profit? Correct Answer 22 : 25 New sale = 110% of usual sale New profit = 20% of 110% = 22% New profit : Usual profit = 22% : 25% = 22 : 25

Explanation:

In the last week of a month, a car dealer sold 12 cars. A new sales promotion came out in the first week of the next month and he sold 19 cars during that week. What was the percent increase in sales from the last week of the previous month to the first week of the next month? Correct Answer 58% Percentage increase in sales = (19 - 12) / 12 x 100% = 58.33%

Explanation:

If the value of ZYZ company stock drops from Tk. 25 per share to Tk. 21 per share , what is the percent of the decrease? Correct Answer 4% the value of XYZ Company stock drops from tk. 25 per share to tk. 21 per share = 25 - 21 = 4 tkThe percentage decrease = Change*100/base year value = 4*100/25 = 16% (ans)

Explanation:

Seats for Mathematics, Physics and Biology in a university are in the ratio 5: 7: 8, There is a proposal to increase these seats by 40% , 50% and 75% respectively. what will be ratio of increased seats? Correct Answer 2: 3: 4 Let, the number of seats for Math, physics, and biology, be 5x, 7x and 8x respectively Number of increased seats are ( 140% of 5x). (150% of 7x) ( 175% of 8x) = (140/100×5x) , ( 150/100×7x), ( 175/100×8x) 7x, 21x/2, 14x The required ratio = 7x : 21x/2 : 14x = 14x : 21x : 28x = 2 : 3 : 4

Explanation:

The capacity of computer memory is increasing exponentially . At the same time increased capacity is becoming available at cheaper rate. Two years ago 1GB RAM cost TK. 5,000. Now 4GB Ram is available at the same price. If this trend continues what capacity of RAM will you get for TK. 5,000 after 3 years time ? Correct Answer 32GB The capacity in every 2 years becomes 4 times  So, the capacity in every year becomes 2 times. The capacity after 3 years will be = 4×2×2×2 = 32GB

Explanation:

During a sale, the price of a pair of shoes is marked down by 10% from the regular price. After the sale ends, the price goes back to the original price. What is the percent increase (to the nearest whole number) form the discounted sale price to the regular price for the shoes? Correct Answer 11% Let the regular price be m. Discounted price = m - 10% of m = 0.9m Price increase = (m - 0.9m) / (0.9m) × 100% ≈ 11%

Explanation:

Babu hired a labor to clean his garden for TK. 35.50. He was very happy with the cleaning and paid the labor bonus in addition to the original agreed TK. 35.50. If the bonus was more than 10 percent but less than 15 percent of the contract amount, then the total amount paid must have been between TK. Correct Answer 39 & 41 Total amount paid if bonus was 10% = 35.50 + 10% of 35.50 = 35.50 + 3.55 = 39.05 TK Total amount paid if bonus was 15% = 35.50 + 15% of 35.50 = 35.50 + 5.325 = 40.825 TK So, the total amount paid must have been in between 39 TK & 41 TK.

Explanation:

A motor pool has 300 vehicles of which 30% are trucks. 20% of all the vehicles in the motor pool are diesel, including 15 trucks. What percent of the motor pool is composed of vehicles that are neither trucks nor diesel? Correct Answer 165% Trucks = 30% of 300 = 90 Other Vehicles (Excluding Trucks) = 300 - 90 = 210 Diesel Vehicle = 20% of 300 = 60 (Including 15 Trucks) Other Diesel Vehicles (Excluding Trucks) = 60 - 15 = 45 Trucks that are NOT diesel = 90 - 15 = 75 Other Vehicles that are NOT diesel Vehicles = 210 - 45 = 165 Required % = (165/300)×100 = 55%

Explanation:

If both length and width of a rectangular plot for a garden are increased by 20%, how many percent of the plot would be increased? Correct Answer 20% 20 + 20 + {(20×20)/100} = 44 [ A + B + {(A×B)/100} এই সূত্রমতে ]

Explanation:

If the length and width of a rectangular garden plot were each increased by 20 percent , what would be the percent increase in the area of the plot? Correct Answer 20% A + B + AB/100 = 20 + 20 + 400/100 = 20 + 20 + 4 = 44

Explanation:

In a group of people solicited by a charity, 30% contributed Tk. 2400 each, 45% contributed Tk. 1200 each, and the rest contributed Tk. 120 each. If the charity received a total of Tk. 18,000 form the people who contributed Tk. 120.00, how much was contributed by the entire group? Correct Answer 774,000 Percent of people’s who is given by Tk.120 = 100 - 30 - 45 = 25% Number of peoples who is given by Tk. 120 = 18,000/120 = 150 Now, 25% of people’s = 150 So, Total number of people’s = (150*100/25) = 600 Total contribution = (600*0.3*2,400) + (600*0.45*1,200) + 18,000 = 774,000 Tk. Ans: 774,000 Tk.