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what does ISO stand for ? Correct Answer International Organization for Standardization IOS অর্থ International Organization for Standardization. আন্তর্জাতিক মান সংস্থা বা আন্তর্জাতিক মানক সংস্থা (আইএসও) একটি আন্তর্জাতিক সংস্থা যা বিভিন্ন দেশের মান নিয়ন্ত্রণকারী প্রতিষ্ঠানের সমন্বয়ে গঠিত। ১৯৪৭ সালের ২৩ ফেব্রুয়ারি এটি প্রতিষ্ঠিত হয়। এটির প্রধান কাজ শিল্প ও বাণিজ্যের বিভিন্ন বিষয়ের উপর মান নির্ধারণ, প্রণয়ন এবং বিভিন্ন প্রতিষ্ঠানকে মানের সনদপত্র প্রদান।

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The Author of the book The Time Machine is-- Correct Answer H.G. wells The Time Machine is a science fiction novella by H. G. Wells, published in 1895 and written as a frame narrative.

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which is the second Largest country in the world by area? Correct Answer Canada Area in square kilometres Russia 17,098,242 Canada 9,984,670

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The word "Lunar' is related to -- Correct Answer Moon Lunar comes from the Latin word luna, meaning moon. The Roman goddess of the moon is called Luna.

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which country is the largest importer of Bangladeshi products? Correct Answer USA বাংলাদেশের পণ্য আমদানিতে শীর্ষ দেশ যুক্তরাষ্ট্র । অর্থনৈতিক সমীক্ষা ২০১৮ অনুসারে , যুক্তরাষ্ট্র ২০১৬ - ১৭ অর্থবছরে বাংলাদেশ থেকে ৫৮৪৬.৬৪ মিলিয়ন মার্কিন ডলারের পণ্য আমদানি করে ।

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' Rickshaw' was first introduced in - Correct Answer Japan As a mode of transport rickshaw was first introduced in Japan in the early twentieth century.

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NATO stands for Correct Answer North Atlantic Treaty Organization The North Atlantic Treaty Organization, also called the North Atlantic Alliance, is an intergovernmental military alliance between 30 North American and European countries foundend in 1949

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'Meteorology' is the science of -- Correct Answer Weather Meteorology is the scientific study of the atmosphere that focuses on weather processes and forecasting.

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which is the smallest country in Asia by Population? Correct Answer Maldives Maldives is regarded as the smallest country in Asia, in terms of both land area and population.

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The SAARC Secretariat is situated in -- Correct Answer kathamandu The SAARC Secretariat is based in Kathmandu, Nepal. The South Asian Association for Regional Cooperation (SAARC) was established with the signing of the SAARC Charter in Dhaka on 8 December 1985. SAARC comprises of eight Member States: Afghanistan, Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan and Sri Lanka.

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Which utility program could improve the speed of dish? Correct Answer Defragmentation Defragmentation involves rearranging the information on a disk so that files appear in continuous sequences of clusters.

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If 5 students run a mile in 5 minutes, how much time will 50 students take to run a mile? Correct Answer 5 minutes 5 students take 5 minutes to run a mile.50 students also take same time to run a mile.

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The meaning of SAFTA is Correct Answer South Asian Free Trade Area The South Asian Free Trade Area is an agreement reached on January 6, 2004, at the 12th SAARC summit in Islamabad, Pakistan.

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A pen was sold at 15% loss. If the selling price was Tk. 8 more , then the seller could have made a profit of 10% . what was the purchase price of pen? Correct Answer 32 Let, Purchase price = Tk.x At 15% loss SP = Tk.(17x/20) At 10% profit SP = Tk.(11x/10) As per question , (17x/20) + 8 = (11x/10) Or, 5x = 160 Or, x = 32 Therefore, the required value = Tk.32

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A car wash center washes 10 cars in half an hour . At this rate how many cars can wash in 4 hours? Correct Answer 80 In 1/2 hr car center washes 10 cars so, " 4hr " " " ( 10 * 2 * 4)/1 = 80 cars.

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In redesigning a cold storage, the length is increased by 30% , the breadth is increased by 50% and the height is reduced by 20% . what is the net increase in the volume of the redesigned cold storage compared to the previous design? Correct Answer 56% Let, length, width and height of the cold storage are respectively l, w and h. so, volume = lwh New length = l + 30/100 l = 1.3 l New width = w + 50/100 w = 1.5 w New height = h - 20/100 h = 0.8 h so, new volume = 1.3 l * 1.5w * 0.8 h = 1.56 lwh increase in volume = (1.56 - 1)lwh = 0.56 lwh percentage increase in volume = 0.56 * 100% = 56%.

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The sum of 6 consecutive odd integers exceeds twice the biggest integer integer by 38. Find sum of the six numbers? Correct Answer 72 let, 6 consecutive odd integer are: 2n - 5, 2n - 3, 2n - 1, 2n + 1, 2n + 3, 2n + 5. so, (2n - 5) + (2n - 3) + (2n - 1) + (2n + 1) + (2n + 3) + (2n + 5) = 2.(2n + 5) + 38 বা, 12n = 4n + 10 + 38 বা, 8n = 48 so, n = 6 sum of six numbers = 12 * 6 = 72

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B and C are points on a straight line AD, where AB= BC=CD . What percent of AC is AD? Correct Answer 66.7% AC/AD = 2/3 = 2/3 * 100 = 66.70%

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If the following series continues to follow the same pattern, what will be the next number: 2 ,6 , 3, 9,6 .....? Correct Answer 18 2, 6, 3, 9, 6.............? 1st number = 2, 3rd number = 2 + 1 = 3, 5th number = 3 + 3 = 6 again, 2nd number = 6, 4th number = 6 + 3 = 9 and 6th number = 9 + 9 = 18

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EXPOSE Correct Answer Display Expose এর synonyms: uncover, reveal, show, display, exhibit, disclose, manifest, unveil, unmask, discover, bring to light।

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what percent of 25 is 0.2 0? Correct Answer 0.8 let x% of 25 is 0.2 so, x/100 * 25 = 0.2 so, x = 0.8

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Mr. Karim deposited Tk. 800 in a bank at 15% annual compound interest rate . At the end of the second year ,the total amount including the interest will be: Correct Answer 1058 We know,  principal with compound interest, C = P(1 + r)n = 800(1 + 15/100)2 = 800×1.152 = 1058 TK

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INADVERTENT Correct Answer Intentional inadvertent - অনিচ্ছাকৃত; অসাবধান। Unintentional - অনভিপ্রেত; Innocuous - ক্ষতি করে না এমন; অনপকারী; নির্দোষ; Accidental - আকস্মিক, দুর্ঘটনামূলক; Intentional - ইচ্ছাকৃত।

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Out of total profit , A gets 40% , B 25% , c 20% , D 10% and E 5% . what percentage of B's profit is that of A? Correct Answer 160% 40/25 * 100% = 160%

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A picnic was attended by 240 persons . There were 20 more men than women and 20 more adults than children .How , many men were there in the picnic? Correct Answer 130 Let, Number of women x so, Number of men = x + 20 so, x + x + 20 = 240 বা, 2x = 220 বা, x = 110 Number of women 110 and Number of men = 110 + 20 = 130

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A watch was sold at 15% loss. If the selling price was Tk 8 more , then the seller could have made a profit of 10% what was the purchase price of that watch? Correct Answer 32 Shortcut method Purchase price or cost = (100×more) / 1st% u 2nd% = (100×8) / ( 15 + 10) = 800/25 = 32

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what past of an hour elapses between 11:40 a. m. and 12: 20 p.m. ? Correct Answer 2/3 11:40am to 12:20pm = 20min + 20 min = 40 min Part of an hour elapse = 40min /60 min = 2/3

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You can now buy 5 more Mangoes with Tk. 75 due to reduction in price by 20 percent. Calculate the current price of one dozen of Mangoes. Correct Answer 36 For Tk.100 reduction in price Tk.20 For Tk.75. " " " (20 * 75)/100 Price of 5 mangoes is tk 15 " " 12 " " (15 * 12)/5 = Tk.36

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GRATIS Correct Answer Free Gratis means without charge; free.

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If x +y =6 y +z = 4 and z +x = 2 then 2y -z -x ? Correct Answer 6 Given, x + y = 6 y + z = 4 z + x = 2 so, 2(x + y + z) = 12 বা, x + y + z = 6 বা, y + 2 = 6 so, y = 4 2y - z - x = 2 * 4 - 2 = 6

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A farmer had 20 hens. All but 2 died. How many hens are still alive? Correct Answer 2 All but 2 died means only 2 survived.

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GLORIOUS Correct Answer Disgraceful Glorious - মহৎ, গৌরবময়, যশোদায়ক; Superb - চমৎকার, অপূর্ব; Amazing - আশ্চর্যজনক, বিস্ময়কর, চমত্কারী, চমকপ্রদ, অদ্ভুত; Disgraceful - মর্যাদা হানিকরা; Wonderful - বিস্ময়কর; অপূর্ব।

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per day wage rate of workers is reduced 50% due to economic slowdown. After one year, the wage rate is increased by 60% . If the per day wage rate before the decrease was Tk. 100, then what is the per day wage rate now? Correct Answer 80 After 50% reduce New wage = 100 - (50/100) * 100 = Tk.50 After 60% increased New wage = 50 + 60/100 * 50 = Tk.80

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Taxi fare is charged at Tk. 15 per mile plus Tk. 150 for a trip. If the total fare by taxi is Tk. 600 . then what is the distance covered in miles by the trip? Correct Answer 30 600 - 150 = Tk.450 Distance = 450/15 = 30 mile

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Sum of the two numbers is 21 and their difference is 7. what is the half of the greater number ? Correct Answer 7 Let, greater number x lower number y x + y = 21 x - y = 7 so, 2x = 28 so, x = 14 x/2 = 7

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If 4 is subtracted from one - fourth of a number , the result is 20. The number is Correct Answer 96 Let, the number x x/4 - 4 = 20 বা, x/4 = 24 so, x = 96

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Out of total profit, A gets 40% , B 25% , C 20% , D 10% and E 5% . A's profit is what percentage of that of B? Correct Answer 160% Lets, A profit is x% of that of B so, 40% = x of 25 % 40/100 = x/100 of 25 /100 40/100 = (x×25) /(100×100) x × 25 = ( 40×100×100) /100 x = ( 4×100)/25 x = 160

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Divide 60 by half and deduct twenty . what do you get? Correct Answer 100 60/(1/2) - 20 = 120 - 20 = 100

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If nis any integer, which of the following is always an odd integer? Correct Answer 2n+1 If, n is an integer then 2n is always even integer. so, (2n + 1) is always an odd number.

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per day wage rate of workers is reduced 50% due to economic slow down. After one year ,the wage rate is increased by 60% . If the per day wage rate before the decrease was Tk.. 100, then what is the per da y wage rate Now? Correct Answer 80 Per day wage rate before the decrease was Tk. 100 per day wage rate of workers is reduced 59%. So, wage rate is ( 100 - 50) = 50 After one year rate increased 60% = 50 + 50 of 60% = 50 + 50×.6 = 80

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one third the sum of 13 and a certain number is the same as one more than twice the number.Find out the number. Correct Answer 2 Let, the number x 1/3 (13 + x) = 2x + 1 বা, 13 + x = 6x + 3 বা, 6x - x = 13 - 3 বা, 5x = 10 so, x = 2

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If A and B are positive and A > B which of the following is true? Correct Answer -B/a> -A/B - B /A > - A/B

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The average of 6 number is 9 , when one number is discarded the average of the remaining numbers becomes 7.2 . What is the discarded number? Correct Answer 18 Total of 6 number is 6×9 = 54 If 1 number is discarded then there are 5 numbers So, total of 5 number is 5×7.2 = 36 So the discarded number is = ( 54 - 36) = 18

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dMr.Salam deposited Tk. 800 in a Bank at 15% annual compound interest rate. At the end of the second year, the total amount including the interest will be . Correct Answer 1058 Total amount including the interest . = 800 ( 1 + 15/100)2 = 1058

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x = 2y +3 and y= -2 , Quantity A =x and Quantity B = -1 Correct Answer The two quantities are equal x = 2y + 3 and y = - 2 So, x = 2 ( - 2) + 3 x = - 4 + 3 x = - 1 So, Quantity A = x = - 1 and B = - 1 are equal.

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Sum of the two numbers is 21 and their difference is 7 . what is the half of the greater number? Correct Answer 7 Let, greater number is x and other is y x + y = 21 x - y = 7 ( + ) 2x = 28 x = 14 x/2 = 7

Explanation:

you can now buy 5 more Oranges with Tk. 75 due to reduction in rice by 20 percent Calculate the current price of one dozen of Oranges. Correct Answer 36 Shortcut method cost/price = given % /100 × total tk /no of more less × no of products for the cost Cost = 20/100×75/5 ×12 = 36