Explanation:

Babul attended five tests during the semester and the average of his test scores was 87. If has average score after first three tests were 85, what was the average of his 4th and 5th test? Correct Answer 90 Total of five test scores = 5 x 87 = 435 Total of first three test scores = 3 x 85 = 255 Total of last two test scores = 435 - 255 = 180 Therefore, averaage of 4th & 5th test scores = 180/2 = 90.

Explanation:

In a lottery, 5% of the tickets printed can be redeemed for prizes, and 5% of those tickets have values in excess of Tk. 50. If 6,000 tickets were printed, how many of them can be redeemed for more than Tk. 50? Correct Answer 15 Given, 5% of the tickets printed can be redeemed for prizes 5% of those tickets have values in excess of Tk. 50 so, 6000*0.05*0.05 = 15 ans: 15

Explanation:

Since 1965 Mr. Ajmal has gained 2 pounds every year. In 1995 he was 40% heavier than what he was in 1965. What percent of his weight in 2010 was his weight in 1995? Correct Answer 87.5% 1965 to 1995 or 30 yrs, - - - - Gains 30*2 = 60 lb 1995 to 2010 or 15 yrs, - - - - Gains 15*2 = 30 lb Now, 40% is equivalent to 60 lb Then, 100% is equivalent to 60*100/40 = 150 lb That is, in 1965 his weight was 150 lb; So, in 1995 = 150 + 60 = 210 lb; And in 2010 = 210 + 30 = 240 lb Required percent = (210/240)*100 = 87.5% (Ans.)

Explanation:

The number of stamps in Ziko's collection is 75% of the number in Pallab's collection. If Pallab has 80 more stamps than Ziko, how many stamps do they have altogether? Correct Answer 560 let, pallab has = X stamps ziko has = 0.75X stamps pallab has x - 0.75x = 0.25x more stamps than than ziko. apq, 0.25x = 80 x = 320 pallab has = 320 stamps ziko has = 320x.75 = 240 together they have = 320 + 240 = 560

Explanation:

The average age of 15 people is 25 years. Out of them, total age of 2 people is 115 years. What is the average age of the other 13 people? Correct Answer 20 years Total age of 15 people = 15 x 25 = 375 years Total age of 2 people = 115 years Total age of the other 13 people = 275 - 115 = 160 So, the average age of the other 13 people = 160/13 = 20 years

Explanation:

Total price of a shirt and a pant is Tk. 850. If the price of the shirt increases by 12% and the pant by 5% then the total price become Tk. 934.50. What was the original price of the shirt before price increment? Correct Answer Tk. 600 Let the original prices of the shirt and the pant be S & P respectively. Then,  S + P = 850    or,  P = 850 - S Again,  1.12S + 1.05P = 934.50 or,  1.12S + 1.05(850 - S) = 934.50 or,  1.12S + 1.05x850 - 1.05S = 934.50 or,  0.07S = 934.50 - 892.50 = 42 or,  S = 42/0.07 = 600 TK.

Explanation:

If the annual interest rate decreases from 4% to 3.75%, income of a person reduces by Tk. 60. What is his principal? Correct Answer Tk. 24,000 given, the annual interest rate decreases from 4% to 3.75% ATQ, (4 - 3.75)% = 60 or, 0.25% = 60 or, 100% = (60/0.25) * 100 = 24000 so, principal = 24000 tk ans: 24000 tk

Explanation:

The length of a rectangle is 6 feet more than the side of a square and the width of the rectangle is 6 feet less than the side of that square. If the area of the square is 64 sq feet, what is the area of the rectangle? Correct Answer 28 sq feet Side of the square = √64 = 8 feet So, length of the rectangle = 8 + 6 = 14 feet Width of the rectangle = 8 - 6 = 2 feet So, the area of the rectangle = 14 x 2 = 28 square feet.

Explanation:

In a business Raj invested Tk. 700 for 5 months. Rafi invested Tk. 500 for 6 months and Rabi invested Tk. 300 for 8 months. If total profit was Tk. 445, how much money will Raj get as his share of profit? Correct Answer Tk. 175 ratio of the investment of Raj:Rafi:Rabi = 700*5:500*6:300*8 = 3500:3000:2400 = 35:30:24 so raj share = 445*35/(35 + 30 + 24) = 175 tk

Explanation:

A class of 120 has 25% girls. If 10% of the boys and 20% of the girls attended a picnic then what percentage of the class attended the picnic? Correct Answer 12.5% Total students = 120 number of girls = 120*25% = 30 number of boys = (120 - 30) = 90 munber of students attended picnic = 90*10% + 30*20% = 6 + 4 = 15 % of students attended picnic = 15/120*100 = 12.5 ans: 12.5%

Explanation:

At a fashion house, shirts are sold for 25% less than the tag price. If a shirt costs Tk. 144, what will be the tag price to make a 25% profit on its cost? Correct Answer Tk. 240 For 25% profit, If cost price is 100 TK, selling price price should be 125 TK. If cost price is 144 TK, selling price should be 125 x 144 / 100 = 180 TK. Let the tag price be T. If 25% discount is given on the tag price then, 75% of T = 180 TK. or,   T = 180 / (75/100) = 240 TK.

Explanation:

Seven friends are having lunch together in a fast food shop. Each of them east at least 3/5th of a pizza. What is the smallest number of whole pizzas needed for their lunch? Correct Answer 5 There are 7 person for lunch One person eats 3/5 of a pizza So 7 person eats = 3/5*7 = 21/5 = 4.2 pizzas so, the smallest no. of whole pizzas is 5

Explanation:

Increasing the original price of an item by 20% and then decreasing the price by 20% is equivalent to which of the following? Correct Answer 4% decrease let the number is 100 increase 20% = 100 + 20 = 120 decrease of 20% on 120 = (20/100)×120 = 24 nett amount 120–24 = 96 So decrease 100–96 = 4 decrease of 4 out of 100 percentage of decrease 4%

Explanation:

The price of a DVD Player is discounted by 10 percent, and the reduced price is then discounted again by 10 percent. The series of successive discounts is equivalent to a single discount of ---- Correct Answer 19% As we know that , Equivalent single discount = D1 + D2 − D1 × D2 % 100 Single equivalent discount = 10 + 10 − 10 × 10 % = 19% 100

Explanation:

If k is divisible by 3, 9 and 12, which of the following is also divisible by these numbers? Correct Answer k + 72 72 is divisible by 3, 9 and 12. Therefore, if 'k' is divisible by those numbers, (k + 72) will also be divisible by them.

Explanation:

Each of two groups of tourists has 60 people. If three-fourth of the first group and two-third of the second group board buses to travel to a museum, how many more people of the first group board buses than that of the second group? Correct Answer 5 Tourists of first group board buses is 3/4 of 60 = 45 Tourists of 2nd group board buses 2/3 of 60 = 40 Difference is 45 - 40 = 5

Explanation:

Basar bought equal numbers of 50-paisa and 75-paisa stamps. If the total cost of the stamps was Tk. 50.00, what was the total number of stamps bought? Correct Answer 80 let, equal number = x atq, 0.75x + 0.50x = 50 or, 1.25x = 50 or, x = 40 total stamp = 40 + 40 = 80 stamp

Explanation:

If 6 workers can complete 9 identical jobs in 3 days, how long (in days) will it take 4 workers to complete 10 such jobs? Correct Answer 5 6 workers - 9 jobs in 3 daysIn one day 6 workers can do 3 jobsIn one day 1 worker can do 0.5 job4 workers can so 2 jobs in a day So. They can do 10 jobs in 5 days

Explanation:

A two-digit number has 3 in its unit digit. The sum of its digit is one-seventh of the number itself. What is the number? Correct Answer 63 Since it is in the form of a two digit number, then we can write it as a decimal expansion with a three in the units place.Let y = 10x + 3We also know that x + 3 = y⋅17x + 3 = y⋅17This means if we multiply both sides by 7 we get:y = 7(x + 3)y = 7(x + 3)y = 7x + 21y = 7x + 21Since these are both equal to y, we can set them equal one another to find x, the tens digit value:7x + 21 = 10x + 37x + 21 = 10x + 3−3x + 21 = 3−3x + 21 = 3−3x = −18−3x = −18x = 6x = 6y = 10x + 3 = 10(6) + 3 = 63

Explanation:

If an integer y is subtracted from an integer x, and the result is greater than x, then y must be : Correct Answer Less than 0 x - y > x x = 1 এবং y = - 1 হলে, x - y = 1 - ( - 1) = 2>1 x = 1 এবং y = - 2 হলে, x - y = 1 + 2 = 3 >1 y <0 হলে x - y > x শর্তটি সিদ্ধ হয়।

Explanation:

The total cost of a bouquet of roses at a flower shop depends on the number of roses ordered. The vase costs $5, and each rose costs $2.25. Which equation can be used to find 'c', the total cost of a bouquet with 'r' roses? Correct Answer c = 5 + 2.25r Cost of the roses only = 2.25 x r = 2.25r Cost of the vase = 5 So, tatal cost, c = 5 + 2.25r

Explanation:

Six consecutive whole numbers are given. The sum of the first three numbers is 27. What is the sum of the last three numbers? Correct Answer 36 Let the numbers be x,x + 1,x + 2, x + 3,x + 4,x + 5 So now ATQ, x + x + 1 + x + 2 = 27 So that's equal to 3x + 3 = 27 which is equal to x + 1 = 9. So x = 8 Now the sum of other three numbers = x + 3 + x + 4 + x + 5 = 3x + 12 = 3*8 + 12 = 24 + 12 = 36 Hence Answer is 36

Explanation:

If y = ( 3x - 6 )/x, then for what values of x, y will be positive? Correct Answer x>2 or x here, y=3x-6xto make y positive, lets check the options. if x=3 then y=1 and if x=-3 then y=5so the answer is x>2 or x<0

Explanation:

The area of a rectangle R with width 4 feet is equal to the area of a square S, which has a perimeter of 24 feet. The perimeter of the rectangle R, in feet, is : Correct Answer 26 we know, perimeter of square = 4a atq, 4a = 24 or, a = 6 so, area of square = 6*6 = 36 according to the question, area of rectangle = 36 or, L*W = 36 or, l = 36/4 or, l = 9 perimeter of rectangle = 2*(9 + 4) = 26 ft (ans)

Explanation:

120 students in a class play cricket or football or both. If 75 students play cricket and 60 students play football, how many play both? Correct Answer 15 120 জন ছাত্রের সবাই ত্রিকেট, ফুটবল অথবা উভয়টি খেলে । যদি 75 জন ক্রিকেট এবং 60 জন ফুটবল খেলে, তাহলে কতজন উভয়টি খেলে ? শুধু ক্রিকেট খেলে = 75 জন এবং ফুটবল খেলে = 60 জন ক্রিকেট ও ফুটবল খেলে = 75 + 60 = 135 জন মোট ছাত্র 120 জন হলে তাদের মধ্যে উভয়টি খেলে = 135 - 120 = 15 জন ।

Explanation:

After taking 30 socks out of the washing machine, Shamim noticed that the ratio of blue socks to brown socks to black socks was 2:3:5. How many black socks were in the washing machine? Correct Answer 15 Dryer মেশিন থেকে 30 টি মোঝা নেয়ার পর Dina খেয়াল করলো যে নীল, বাদামি ও কালো রংয়ের মোজার অনুপাত হলো 2 : 3 : 5. Dryer মেশিনে কয়টি কালো রংয়ের মোজা ছিলো ? Black মোজার সংখ্যা = 30 ×52 + 3 + 5×52 + 3 + 5 = 15 টি

Explanation:

If b <2 and 2x-3b=0, which of the following must be true? Correct Answer x given 2x - 3b = 0 or x = 3b/2 and b<2 St 1: x> - 3 lets consider possible value of b if b = - 24 then x = - 36 so x> - 3 could be true but not must be true St2: x<2 if b = 1.9 the x = 3*1.9/2 or x> 2 so this condition could be true but not must be true St3: x = 3 for x = 3 we need b = 1 which is possible but again falls under could be true cause b can take any value Less than 2 St4: x<3 - - - - - - - > or 3b/2<3 we get (3b - 6)/2< 0 or 3b - 6< 0 Or b< 2 which is same as the original given condition

Explanation:

If an inspector rejects 0.08% of a product as defective, how many units of the product will be examined in order to reject 2? Correct Answer 2500 0.08 % rejected 0.08 is rejected out of 100 1 is rejected out of = 100/(0.08) = 10000/8 = 1250 2 is rejected out of = 2*1250 = 2500

Explanation:

What does 'ISP' stand for? Correct Answer Internet Service Provider ISP - - Internet Service Provider ISP stands for Internet Service Provider, which is a company or organization that provides services for Internet access.

Explanation:

The sum of two numbers is 56. If three times of the smaller number is one-half of the larger number, what is the larger number? Correct Answer 48 let, the larger number = x smaller number = x - 56 atq, 3(56 - x) = x/2 or,7x/2 = 168 or,x = 24*2 = 48 so, the larger number is = 48 (ans)

Explanation:

Three boys have marbles in the ratio of 19 : 5 : 3. If the boy with the least number has 9 marbles, how many marbles does the boy with the highest number have? Correct Answer 57 Here 3 is equivalent to 9 So, 19 is equivalent to 9*19/3 = 57 Ans: 57

Explanation:

Ms. Zareen purchased stock for Tk. 15,000 and 2/3 of it after its value doubled. She sold the remaining stock at 5 times its purchase price , what was her total profit? Correct Answer Tk. 30,000 Original price: 2/3 of stock = 10000 1/3 of stock = 5000 Sale price: 2/3 doubled = 2*10000 = 20000 1/3 quintupled = 5*5000 = 25000 Total profit = Total selling price - Total purchase price of stock = (20000 + 25000) - (10000 + 5000) = 45000 - 15000 = 30000 tk

Explanation:

Who said the words,'I disapprove of what you say, but I will defend to death your right to say it? Correct Answer Voltaire ১৯০৬ সালে S. G. Tallentyre কর্তৃক প্রণীত জীবনী গ্রন্থ ‘The Friends of Voltare’ - এ উক্তিটি উল্লেখ করেছেন । উক্তিটি ছিল ভলতেয়ারের ।

Explanation:

The publisher of 'Banglapedia' is --- Correct Answer Asiatic Society of Bangladesh বাংলাদেশ এশিয়াটিক সোসাইটি ২০০৩ সালে ১০ খন্ডে বাংলাদেশ জাতীয় জ্ঞানকোষ ‘বাংলাপিডিয়া’ প্রকাশ করে । ২০১১ সালের জুন মাসে ১৪ খন্ডে বায়লাপিডিয়ার দ্বিতীয় সংস্কারণ প্রকাশিত হয় । বাংলাপিডিয়ার প্রধান সম্পাদক হলেন অধ্যাপক ড. সিরাজুল ইসলাম ।

Explanation:

Which of the following harmful rays comes out from colour TV? Correct Answer Gama ray রঙিন টেলিভিশন থেকে ক্ষতিকর গামা রশ্মি নির্গত হয় । ক্যান্সার টিউমার প্রভূতি রোগ নিরাময়ে গামা রশ্মি ব্যবহৃত হয় । মহাশূন্য থেকে পৃথিবীতে আগত রশ্মি হলো কসমিক রশ্মি, তেজস্ক্রিয় পর্দাথ থেকে আলফা, বিটা ও গামা রশ্মি নির্গত হয় ।

Explanation:

Which district was first set free from enemy during the liberation war of Bangladesh? Correct Answer Jessore ১৯৭১ সালের স্বাধীনতা যুদ্ধের সময় প্রথম ৬ ডিসেম্বর ১৯৭১ শত্রুমুক্ত হয় যশোর জেলা । চূড়ান্ত বিজয় অর্জিত হয় ১৬ ডিসেম্বর,১৯৭১ । উল্লেখ, যশোর জেলার বর্তমান উংরেজি বানন Jashore ।

Explanation:

The poetry titled 'September on Jessore Road' was written based on liberation war by ---- Correct Answer Allen Ginsberg মার্কিন কবি অ্যালান গিন্সবার্গ ১৯৭১ সালে মুক্তিযুদ্ধের সময় বাংলাদেশ ভ্রমণ করেন এবং যুদ্ধবিধ্বস্ত জনপদ যশোর জেলাকে কেন্দ্র করে লিখেন বিখ্যাত কবিতা ‘সেপ্টেম্বর অন যশোর রোড’ । ১৫২ চরণের এই কবিতায় যুদ্ধের করুণ দৃশ্য ফুটে ওঠেছে ।

Explanation:

Which of the following country of the European Union has not adopted 'Euro' as yet --- Correct Answer England ইউরোপীয় ইউনিয়নের ২৮টি দেশের মধ্যে বর্তমানে ইউরো প্রচলিত রয়েছে ১৯ টি দেশে । ইউরোপীয় ইউনিয়নের যেসব দেশে এখনো ইউরো চালু হয়নি সেগুলো হলো – ইংল্যান্ড , ডেনর্মাক , সুইডেন , চেকপ্রজাতন্ত্র , পোল্যান্ড ,হাঙ্গেরি , বুলগেরিয়া , রুমানিয়া ও ক্রোয়েশিয়া ।

Explanation:

One nautical mile =? Correct Answer 1.852 km ১ নটিক্যাল মাইল = ১.৮৫২ কিমি বা ১.১৫১ মাইল । ভূপৃষ্ঠে দূরত্ব পরিমাপের একক যেমন কিমি তেমনি সমুদ্রপৃষ্ঠে দূরত্ব পরিমাপের একক হলো নটিক্যাল মাইল ।

Explanation:

Where do most of the Manipuri ethnic group people live in Bangladesh? Correct Answer Sylhet মণিপুরী ক্ষুদ্র নৃ - গোষ্ঠী বাংলাদেশের বৃহত্তম সিলেট জেলার বাস করে । মণিপুরী প্রথম ১৭৬৫ সালে বাংলাদেশে আসে এবং সিলেট , মৌলভীবাজর এবং হবিগঞ্জ জেলার আসাম - পাহাড় অঞ্চলে বসবাস শুরু করে ।