Explanation:

If five students run a mile in 5 minutes, then how much time will 50 students take to run a mile? Correct Answer 5 min Here, all of the students run together. So, each of them will take same time i.e. 5 minute to run a mile. Therefore, even if there are 50 students running together, they will take the same time i.e. 5 minutes to run a mile.

Explanation:

A number consists of two digits, whose sum is 10. If 18 is subtracted from the number, digits are reversed. The number is ---- Correct Answer 64 [***This question is erroneous. Correction: If '14' is subtracted.....] Let,  X and Y be the decimal and unit place digits respectively. So, the number is (10X + Y). If the digits gets reversed, the number becomes (10Y + X). Now,  X + Y = 10 or, X = 10 - Y Again,  10X + Y - 14 = 10Y + X or,  10(10 - Y) - 14 = 10Y + (10 - Y) or,  100 - 10Y - 14 = 10Y + 10 - Y or,  10Y + 10Y - Y = 100 - 14 - 10 or,  19Y = 76 or,  Y = 4 So,  X = 10 - Y = 10 - 4 = 6 Therefore the number is 64.

Explanation:

The ratio of boys and girls in a class is 1 : 2 and the classroom has 24 students. How many boys would have to be admitted to make ratio of boys to girls 1 : 1? Correct Answer 8 Number of girls = {2/(2 + 1)} x 24 = 16 Number of boys = 24 - 16 = 8 If the number of boys becomes 16, the ratio of boys and girls will be 16 : 16 = 1 : 1 So, the number of boys needed to be admitted = 16 - 8 = 8

Explanation:

A cooperative collected Tk. 5,000 from its members. if each member contributed at least Tk. 240. What is the greatest number of members that the cooperative could have? Correct Answer 20 If each member contributed the minimum 240 TK, the number of members will be the greatest. So, the greatest number of members possible = 5000/240 ≈ 20

Explanation:

A rectangular carpet, that is 9 feet by 12 feet, covers 60% of a rectangular floor. What is the area of the floor? Correct Answer 180 square feet Area of the carpet = 9 x 12 = 108 sq ft 60% of the floor = 108 sq ft So, total or 100% floor area = 108 x 100 / 60 = 180 sq ft

Explanation:

If the cooperative (from the previous question) has the greatest number of members possible (with a minimum of Tk. 240 contribution) and all members except one paid exactly Tk. 240, then how much did the member who paid higher than the rest, pay? Correct Answer Tk. 440 Greatest number of members possible = 5000 / 240 ≈ 20. Let the payment made by the single member be X. The rest 19 members paid TK. 240 each. So,  240×19 + X = 5000 or,  X = 5000 - 4560 = 440 TK

Explanation:

Father's age is four times of his son's age now. Twenty years from now, father's age will be double his son's age. What will be the son's age ten years from now? Correct Answer 20 Let's son's Age = x Fathers Age = 4x 4x + 20 2 ( x + 20) 2x = 20 x = 10 10 + 10 = 20

Explanation:

If x=1/x, then what can be the value of x? Correct Answer 1 or -1 Given, x = 1/x or,x^2 = 1 or,x = √1 or,x =   1 or - 1(ans)

Explanation:

If a plane can travel P miles in Q hours, how long will it take to travel R miles? Correct Answer QR/P hours A plane travels P miles in Q hours it travels R miles in QR/P hours ans: QR/P hours

Explanation:

In a certain class 40% of the students are girls, and 20% of the girls wear glasses. What percent of students in the class are girls who wear glasses. Correct Answer 8% Let the total number of students in a class = 100 40% of students are girls. Number of girls in a class =   20% of the girls wear glasses. Number of girls wear glasses =   Percentage of the children in the class are girls who wear glasses =   = 8% ans: 8%

Explanation:

Which of the following fractions is the smallest? Correct Answer 2/9 here,2/9 = 0.225/8 = 0.6251/2 = 0.57/12 = 0.582/9 is the smallest of other

Explanation:

In 2000, the book value of a car was 2/3rd of the original purchase price, and in 2004, its book value was 1/2 of the original purchase price. By what percentage did the value of the car decrease from 2000 to 2004. Correct Answer 25% In 2000, the book value of a car was 2/3rd of the original purchase price, and in 2004, its book value was 1/2 of the original purchase price. By what percentage did the value of the car decrease from 2000 to 2004. Let the original price be P. Value in 2000 = 2P/3 Value in 2004 = P/2 So, percentage of decrease in value = (2P/3 - P/2) / (2P/3) x 100% = 25%

Explanation:

Per column inch (1 column * 1 inch) area newspaper advertisement costs Tk. 1,200. How much would a "5 columns by 3 inches" newspaper advertisement cost? Correct Answer Tk. 18,000 1 column x 1 inch ≡ 1200 TK So, total cost = 5 x 3 x 1200 = 18000 TK.

Explanation:

What is 35% of 11/56 of 160? Correct Answer 11 35% of 11/56 of 160= 35100×1156×160= 11

Explanation:

The value of 0.4*0.04*0.004*40 is -- Correct Answer 0.00256 The value = 4 ×. 04 ×. 004 × 40            = ( 4 × 04 × 004 × 40) /( 10 × 100 × 1000)           = 256/100000           = 0.00256 (ans)

Explanation:

A man sod his watch at a loss of 5% . Had he sold it for TK. 56.25 more he woud hae gained of 10% . The cost price of the watch is - Correct Answer TK. 375 Selling price at 5% loss = 100 - 5 = 95 TK. Selling price at 10% gain = 100 + 10 = 110 TK Difference in selling price = 110 - 95 = 15 TK. For the selling price being 15 TK more than initial, the actual cost price = 100 TK. For the selling price being 56.25 TK more than initial, the actual cost price = 100 x 56.25 / 15 = 375 TK

Explanation:

Which of the next number in the series? 2, 5, 7, 8, 8------ Correct Answer 7 Given, the series is 2, 5, 7, 8, 8 - - - - - - 2 + 3 = 5 5 + 2 = 7 7 + 1 = 8 8 + 0 = 8 so,8 + ( - 1) = 7.ans

Explanation:

An empty pool is being filled with water at a constant rate, 3/5th of the pool has filled in 7 hours. How much more time will it take to completely fill the pool? Correct Answer 4 hours 40 minutes Remaining part = 1 - 3/5 = 2/5 3/5 part of the pool is filled in 7 hours So, 2/5 part of the pool is filled in 7 x (2/5) / (3/5) hours = 7 x 2 / 3 hours = 14 / 3 x 60 minutes = 280 minutes = 4 hours 40 minutes

Explanation:

The interest on a certain deposit at 9% per annum is TK. 405 in one year . How much will the additional interest in one year be on the same deposit at 10 percent per annum ? Correct Answer None of these We know,  I = Pnr or,  P = I / nr = 405 / (1 x 9/100) = 4500 TK. Now, interest per annum at 10% interest rate = 4500 x 1 x (10/100) =  450 TK So, additonal interest will be = 450 - 405 =  45 TK.

Explanation:

If a shirt marked Tk. 12.50 is sold at Tk. 10, then what is the rate of discount on the marked price? Correct Answer 20% 12.5 - 10/12.50 = 25/125 × 100% = 20%

Explanation:

If the length and width of a rectangular plot were increased by 20 percent, then what would be the percent increase in the area of the plot? Correct Answer 44% Short - cut Method A + B + AB /100 = 20 + 20 + (20× 20)/100 = 40 + 4 = 44 or 44%

Explanation:

A and B are in the ratio of 5: 4 , B and C in the ratio of 3 : 2. What is the ratio of A : C ? Correct Answer None of these A : B = 5 : 4 = (5 x 3) : (4 x 3) = 15 : 12  B : C = 3 : 2 = (3 x 4) : (2 x 4) = 12 : 8 So,  A : B : C = 15 : 12 : 8 Therefore,  A : C = 15 : 8

Explanation:

In a class of 22 students, 21 students get an average of 44 marks . If the remaining students get 66 marks , the average marks of the whoe class is - Correct Answer 45 Total marks of the 21 students = 44 x 21 = 924 So, total marks of the whole class = 924 + 66 = 990 Average marks of the whole class = 990 / 22 = 45.

Explanation:

A penci costs 5 paisa. These are sold at 20% profit. Find out the selling price of one dozen pencils. Correct Answer 72 paisa Cost of a pencil = 5 paisa Cost of a dozen or 12 pencils = 5 x 12 = 60 paisa Selling price at 20% profit = 60 + 20% of 60 = 60 + 12 =  72 paisa

Explanation:

What percent of 50 is 2 ? Correct Answer 4 Let the percentage be X. Then,  X% of 50 = 2 or,  X/100 x 50 = 2 or, X = 2 x 100 / 50 So, X = 4.

Explanation:

An ore contains 26% of copper . To get 91 kgs of copper the quantity of are required is - Correct Answer 350 kg 26 kg of copper is contained in 100 kg of ore. [As the ore contains 26% copper] So,  91 kg of copper is contained in 100 x 91 / 26 =  350 kg of ore.

Explanation:

চতুর্ভুজের ৪ কোণের সমষ্টি কত? সঠিক উত্তর ৩৬০ ডিগ্রী চতুর্ভুজ এর একটি কোণ ৯০°৪ টি কোণ ৩৬০°

Explanation:

কোনটি বড় ? সঠিক উত্তর ৩/৪ এখানে,3/4 = 0.753/5 = 0.63/6 = 0.53/7 = 0.428এখানে 3/4  সবচেয়ে বড়

Explanation:

a+b=5 এবং ab=2 হলে a2+b2 এর মান কত? সঠিক উত্তর ২১ a + b = 5 এবং ab = 2 ∴a2 + b2 = (a + b)^2 - 2ab       = 5^2 - 2*2       = 25 - 4       = 21.(ans)

Explanation:

একজন বিক্রেতা শার্টের গায়ে লিখিত বিক্রয়মূল্য ৯০টাকার উপর ১৫% ডিস্কাউন্ট দেন। শার্টটির ক্রয়মূল্য কত? সঠিক উত্তর ৭৬.৫০ টাকা ৯০ টাকার উপর ১৫% ডিসকাউন্ট দেন ডিসকাউন্ট =   ৯০ টাকার ১৫%                   = ৯০*.১৫ = ১৩.৫ টাকা তাহলে, ক্রয় মূল্য = ৯০ - ১৩.৫ = ৭৬.৫ টাকা

Explanation:

একটি পরীক্ষায় ৭৫ টি প্রশ্ন ছিল। রহিম ৬০ টি প্রশ্নের উত্তর দিয়েছে । সে শতকরা কতটি প্রশ্নের উত্তর দিয়েছে? সঠিক উত্তর ৮০% ৭৫টি প্রশ্নের মধ্যে শুদ্ধ উত্তর দিয়েছে ৬০টি ১  "        "       "       "       "         "    (৬০÷৭৫) " ১০০ "     "     "       "      "        "    (৬০×১০০÷৭৫)"                                                      = ৮০টি  উত্তর:৮০%

Explanation:

এক কিলোমিটার সমান কত মাইল? সঠিক উত্তর .৬২১ মাইল মেট্রিক পদ্ধতিতে এক কিলোমিটার প্রায় ০.৬২১ মাইল, ১০৯৪ গজ অথবা ৩২৮১ ফুট এর সমান।

Explanation:

৫% সুদে ২০০টাকার ৫ বছরের সুদ কত? সঠিক উত্তর ৫০টাকা আমরা জানি, সুদ বা মুনাফা = (মুলধন x সময় x সুদেরহার) / ১০০                       = (২০০ x ৫ x ৫)/১০০  টাকা                       =   ৫০টাকা উত্তরঃ   ৫০টাকা

Explanation:

৮, ১১, ১৭, ২৯, ৫৩, ......... এ ধরার পরের সংখ্যা- সঠিক উত্তর ১০১ ৮, (৮×২ - ৫), (১১×২ - ৫), (১৭×২ - ৫), (২৯×২ - ৫), (৫৩×২ - ৫)          ১১,            ১৭,           ২৯,          ৫৩,       ১০১ (উত্তর)

Explanation:

A train running at 36 kmph passes another train completely in 12 sec , which is half of its length , running in the opposite direction at 54 kmph. Kf it also passes a railway platform in 1.5 m , what is the length of the platform (in meters)? Correct Answer 700 When a train crosses a platform or a train, it passes its own lwngth + the platform Or trains kength. Now (36 + 54) = 90km/h = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>90</mn><mrow><mn>3</mn><mo>.</mo><mn>6</mn></mrow></mfrac><mi>m</mi><mo>/</mo><mi>s</mi><mo> = </mo><mn>25</mn><mi>m</mi><mo>/</mo><mi>s</mi><mo>;</mo><mo> </mo><mn>25</mn><mi>m</mi><mo>/</mo><mi>s</mi><mo>×</mo><mn>12</mn><mi>m</mi><mo>/</mo><mi>s</mi><mo> = </mo><mo> </mo><mn>300</mn><mi>m</mi><mi>e</mi><mi>t</mi><mi>e</mi><mi>r</mi><mspace linebreak = "newline"/><mi>s</mi><mi>o</mi><mo> </mo><mi>t</mi><mi>r</mi><mi>a</mi><mi>i</mi><mi>n</mi><mi>s</mi><mo> </mo><mi>l</mi><mi>e</mi><mi>n</mi><mi>g</mi><mi>t</mi><mi>h</mi><mo> </mo><mo> = </mo><mfrac><mrow><mn>300</mn><mo>×</mo><mn>2</mn></mrow><mn>3</mn></mfrac><mo> </mo><mo> = </mo><mo> </mo><mn>200</mn><mo> </mo><mi>m</mi><mi>e</mi><mi>t</mi><mi>e</mi><mi>r</mi><mspace linebreak = "newline"/><mi>n</mi><mi>o</mi><mi>w</mi><mo>,</mo><mfrac><mrow><mn>200</mn><mo> + </mo><mi>p</mi><mi>l</mi><mi>a</mi><mi>t</mi><mi>f</mi><mi>o</mi><mi>r</mi><mi>m</mi><mi>s</mi><mo> </mo><mi>l</mi><mi>e</mi><mi>n</mi><mi>g</mi><mi>t</mi><mi>h</mi></mrow><mrow><mn>1</mn><mo>.</mo><mn>5</mn><mo>×</mo><mn>60</mn></mrow></mfrac><mo> </mo><mo> = </mo><mfrac><mn>36</mn><mrow><mn>3</mn><mo>.</mo><mn>6</mn></mrow></mfrac><mspace linebreak = "newline"/><mi>O</mi><mi>r</mi><mo>,</mo><mo> </mo><mi>p</mi><mi>l</mi><mi>a</mi><mi>t</mi><mi>f</mi><mi>o</mi><mi>r</mi><mi>m</mi><mo> </mo><mi>l</mi><mi>e</mi><mi>n</mi><mi>g</mi><mi>t</mi><mi>h</mi><mo> </mo><mo> = </mo><mo> </mo><mn>900</mn><mo> - </mo><mn>200</mn><mo> = </mo><mn>700</mn><mo> </mo><mi>m</mi><mi>e</mi><mi>t</mi><mi>e</mi><mi>r</mi><mo>.</mo></math>

Explanation:

১০০/.০১= কত? সঠিক উত্তর ১০০০০ ১০০/.০১ = ১০০/(১/১০০) = ১০০*১০০ = ১০০০০ (উত্তর)

Explanation:

১, ২, ৪, ৮ এ ধারাটির পরের সংখ্যা কত? সঠিক উত্তর ১৬ ১ম পদ = 20 = 1২য় পদ = 21 = 2 ৩য় পদ = 22 = 4৪র্থ পদ = 23 = 8 ৫ম পদ = 24 = 16.(ans)

Explanation:

If Arif is making a profit of 25 percent on his selling price, what is his actual profit percentage? Correct Answer 25% Actual profit percentage = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>25</mn><mrow><mn>100</mn><mo> - </mo><mn>25</mn></mrow></mfrac><mo>×</mo><mn>100</mn><mo> = </mo><mn>33</mn><mo>.</mo><mn>33</mn><mo>%</mo></math>

Explanation:

How many numbers from 11 to 50 are there which are exactly divisible by 7 but not by 3? Correct Answer 4 The numbers are 14,28,35,49 Whice are divisible by but not by 3

Explanation:

একটি স্কুলে ছাত্র-ছাত্রীর অনুপাত ৩ঃ৭। যদি স্কুলে ১৫০ জন ছাত্র ছাত্রী থাকে তাহলে ছাত্রের সংখ্যা কত? সঠিক উত্তর ৪৫ ছাত্র - ছাত্রীর অনুপাত ৩ঃ৭ ধরি, ছাত্রের সংখ্যা ৩ক ছাত্রীর সংখ্যা ৭ক প্রশ্নমতে, ৩ক + ৭ক = ১৫০ বা, ১০ক = ১৫০ অতএব,ক = ১৫ সুতরাং, ছাত্রের সংখ্যা = ৩*১৫ = ৪৫ জন উত্তরঃ ৪৫ জন

Explanation:

A florist has 200 roses and 180 jasmines with him . He was asked to make garlands of flowers. Which of the following numbers of flower will join together without leaving a single flower? Correct Answer 20 <math xmlns = "http://www.w3.org/1998/Math/MathML"><mn>200</mn><mo>÷</mo><mn>20</mn><mo> = </mo><mn>10</mn><mo>;</mo><mo> </mo><mn>180</mn><mo>÷</mo><mn>20</mn><mo> = </mo><mn>9</mn><mo>;</mo><mo> </mo><mi>D</mi><mi>i</mi><mi>v</mi><mi>i</mi><mi>d</mi><mi>i</mi><mi>n</mi><mi>g</mi><mo> </mo><mi>b</mi><mi>y</mi><mo> </mo><mi>o</mi><mi>t</mi><mi>h</mi><mi>e</mi><mi>r</mi><mo> </mo><mi>t</mi><mi>h</mi><mi>e</mi><mi>r</mi><mi>e</mi><mo> </mo><mi>o</mi><mi>p</mi><mi>t</mi><mi>i</mi><mi>o</mi><mi>n</mi><mi>s</mi><mo> </mo><mi>k</mi><mi>e</mi><mi>e</mi><mi>p</mi><mi>s</mi><mo> </mo><mi>r</mi><mi>e</mi><mi>m</mi><mi>a</mi><mi>i</mi><mi>n</mi><mi>s</mi><mo>.</mo></math>

Explanation:

The simple interest on a certain sum of money at 4 percent per annum for 4 years is Tk. 87.5 more than interest on the same sum for 3 years at 5 percent per annum . Find the sum of money. Correct Answer Tk. 8,750 Let, the sum of money = x <math xmlns = "http://www.w3.org/1998/Math/MathML"><mi>x</mi><mo>(</mo><mn>4</mn><mo>×</mo><mo>.</mo><mn>04</mn><mo> - </mo><mn>3</mn><mo>×</mo><mn>0</mn><mo>.</mo><mn>5</mn><mo>)</mo><mo> = </mo><mn>87</mn><mo>.</mo><mn>5</mn><mspace linebreak = "newline"/><mo>⇒</mo><mfrac><mi>x</mi><mn>100</mn></mfrac><mo> = </mo><mn>87</mn><mo>.</mo><mn>5</mn><mspace linebreak = "newline"/><mo>⇒</mo><mi>x</mi><mo> = </mo><mn>8750</mn></math>

Explanation:

If debater B is selected and debater Y is rejected, the team will consist of which foursome? Correct Answer X, Z, D and B Option (a) has A and B they cannot work together" © " Z " C " " " "