Explanation:

If the sum of (3, 7 and x) is 18, then the average of (3, 7 and x) is Correct Answer 6 3+7+x=18x=8average=3+7+8/3=6

Explanation:

Out of a group of 80 applicants for a public service examination, 20 persons failed to appear for the first part of the test. What percent of the total applicants appeared for this part of the test? Correct Answer 75 Appeared applicants = 20/80×100% = 75%

Explanation:

Mr. Rahim who is 28 years of age has a son who is 4 years old. In how many years will Mr. Rahim be 4 times as old as his son? Correct Answer 4 Let, after x years Mr. Rahman will be 4 times as old as his son. So, 4(4 + x) = 28 + x or, 16 + 4x = 28 + X or, 4x - x = 28 - 16 or, 3x = 12 or, x = 4 Therefore, after 4 years Mr. Rahman will be 4 times as old as his son and that is answer option (d).

Explanation:

Six workers can do 9 identical jobs in 3 days. How long will it take 4 workers to do 10 such jobs? Correct Answer 5 days If 6 workers can complete 9 jobs in 3 days, then 6 workers can complete 9/3 = 3 jobs in 3/3 = 1 day, then 6/6 = 1 worker can complete 3/6 = 1/2 job in 1 day, then 4 × 1 = 4 workers can complete 4 × 1/2 = 2 jobs in 1 day, then 4 workers can complete 5 × 2 = 10 jobs in 5 × 1 = 5 days.

Explanation:

Mr. X bought a dozen of apples for Tk. 18. He sells two apples at the purchase price of 3 apples. What is the selling price of a dozen apples? Correct Answer 27 ১২ টির ক্রয়মূল্য = ১৮ টাকা১ টির ক্রয়মূল্য = ১৮/১২ টাকা৩  টির ক্রয়মূল্য = ১৮×৩১২ = ৯২টাকা এখন,           ২  টির বিক্রয়মূল্য = ৯২ টাকা          ১ টির বিক্রয়মূল্য = ৯২×২         ১২ টির বিক্রয়মূল্য = ৯×১২২×২  = ২৭ টাকা (উত্তর)

Explanation:

Present ages of Saleh and Anu are in the ratio of 5:4 respectively. Three years later, the ratio of their ages will become 11:9 respectively. What is Anu's present age in years? Correct Answer 24 Let, present age of Saleh = 5X      present age of Anu = 4Xas per condition,                             5X+34X+3 = 119 45X+27 = 44X+33 X = 6 So, the Anu's present age is = 4*6 = 24 years (Ans)

Explanation:

Salaries of A, B and C are in the ratio 2:4:6. Salary of Band C together is Tk. 12,000 By what percent is salary of C more than that of A? Correct Answer 200 Let, A as 2X,  B as 4X, C as 6X4X+6X = 1200X = 1200now, Salary of A = 2X = 2400         Salary of C = 6X = 7200C's salary is higher than A = 7200 - 2400 = 4800now, C = A * P%         4800 = 2400 * P100        P = 200C salary is 200% more than that salary of A (Ans.)

Explanation:

Sakib's weekly salary is Tk. 70 less than Javed's , whose weekly salary is Tk. 50 more than Samir's. If Samir earns tk. 280 per week, how much does Sakib earn per week? Correct Answer 260 Sakib = Javed - 70Javed = Samir + 50             = (280 + 50) tk    as Samir = 280tk             = 330 tk now, Sakib = Javed - 70                      = 330-70                      = 260 (Ans.)

Explanation:

A hostel spends Tk. 3200 as cost of rice 20 students for 30 days. If they spend Tk. 2400 for 30 students, for how many days will the rice last? Correct Answer 15 days ৩২০০ টাকায় ২০ জন ছাত্রের খাবার আছে = ৩০ দিনের৩২০০ টাকায় ১ জন ছাত্রের খাবার আছে  = ৩০*২০ দিনের৩২০০ টাকায় ৩০ জন ছাত্রের খাবার আছে  = 30×2030 দিনের২৪০০ টাকায় ৩০ জন ছাত্রের খাবার আছে = 30×20×240030×3200দিনের                                                                     = ১৫ দিনের (উত্তর)

Explanation:

The least number of 5 digits which is exactly divisible by 12, 15, and 18 is - Correct Answer 10080 12, 15, 18 L.C.M = 2×2×3×5×3 = 180 Least no. of 5 digis = 10000 Remainder = 100 Least number = 10000 + ( 180 - 100) = 10080

Explanation:

The least perfect square,which is divisible by each 21, 36 and 66 is - Correct Answer 213444 L.C.M of 21, 36, 66 = 2×2×3×3×7×11 = 2772 To make it a perfect square , it must be multiplied by. 7 × 11 So, required number = 22× 32×72×112 = 213444

Explanation:

The sum of two numbers is 12 and their product is 35. What is the sum of reciprocals of these numbers? Correct Answer 12/35 Let the two numbers be x and y x + y = 12 and, xy = 35 Now, 1/x + 1/y = (y + x)/xy = 12/35

Explanation:

The total of 10 number is 462; the average of the first 4 numbers is 52; the average of the last 5 numbers is 38. What is the fifth number? Correct Answer 64 The total of the first 4 numbers = 4×52 = 208 The total of the last 5 numbers = 5×38 = 190 The total of the (4 + 5 = 9) numbers = 208 + 190 = 398 So, the fifth number = 462 - 398 =  64

Explanation:

The average of five consecutive average number is 61. What is the difference between the highest and lowest number? Correct Answer 8 Let, number be x, x + 2, x + 4, x + 6, and x + 8 Then ( x + x + 2 + x + 4 + x + 6 + x + 8)5 = 61 5x + 20 = 305 x = 57

Explanation:

The average of six numbers is 6. If 3 is subtracted from each of the numbers, what is the new average? Correct Answer 3 Sum of 6 numbers are = 6*6 = 36After subtracting 3 from each of the numbers,                           the new 6 numbers are = 36 - 6*3 = 18the new average = 18/6 = 3 (Ans)

Explanation:

A vertical pole 6 feet high casts a shadow 4 feet long. At the same time a tree cast a shadow 64 feet long. What is the length, in feet, of the trees? Correct Answer 96 Let, length of the trees = X feetas per condition,                            64 = X64                             X = 96So, the length of the tree = 96 feet (Ans)

Explanation:

A book had a catalogue price of Tk. 400. It was sold at a discount of 15% . If the book had a cost of Tk. 200, what was the percentage of profit? Correct Answer 70 Selling Price = 400 - 400×15100                         = 340tkCost Price = 200tkprofit = 340 - 200 = 140tkpercentage of profit = 140×100200                                        = 70 (Ans.)

Explanation:

What is the eight term of the sequence 1, 4, 9, 16, 25, ...., ...., .....? Correct Answer 64 This is a square number sequence, so the eighth term will be 82  =64

Explanation:

A boy multiplied 423 by a number and obtained 65589 as his answer. If both the fives in the answer are wrong and all other figures are correct, the correct answer is- Correct Answer 60489 Obeservation of the results tell us that the multiplier should end with a 3 o as ( 3×3) = 9 and should be between 140 and 160 as ( 423 × 160) = 67680 The possible multiplicants thoufare are 143, 153, and 163 while trying to multiply 153, and 163 don't give 89 as the last 2 digit Multiply 423 to arrive to 60489

Explanation:

If K is an integer and .0010100 x 10k is greater than 1000, what is the least possible value of K? Correct Answer 6 By option test: 0.0010101*10^6 = 1010.1 তাই এখানে উত্তর হবে ৬। প্রশ্নে বলা আছে কত মান বসালে প্রদত্ত সংখ্যার থেকে নূন্যতম বড় সংখ্যা হবে। তাই ৬ বসালে শর্ত পূরন করে। ৭ বসালে বড় ব্যব ধান হবে আবার ৪ বসালে ছোট হয়ে যাবে। তাই এখানে ৬ বসালে সঠিকভাবে শর্ত পূরন করে।

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 44% Shortcut - 20 + 20 + (20*20/100) = 44% increased

Explanation:

3.003/2.002 =? Correct Answer 1.5 ২.০০২)৩.০০৩(১.৫ ২.০০২ ________________ ১.০০১০ ১.০০১০ ___________________ ০

Explanation:

If b< 2 and 2x -3b=0 , which of the following must be true? Correct Answer X Given that, 2x - 3b = 0 = > 2x = 3b = > 2x<(3×2) i.e b<2 x<3 Ans.

Explanation:

what is the least integer that is a sum of three different primes each greater than 20? Correct Answer 83 Three different primes each greater than 20 are 23, 29, 31 So, Sum = 23 + 29 + 31 = 83 Normal 0 false false false EN - US X - NONE X - NONE /* Style Definitions */ table.MsoNormalTable {mso - style - name:"Table Normal"; mso - tstyle - rowband - size:0; mso - tstyle - colband - size:0; mso - style - noshow:yes; mso - style - priority:99; mso - style - parent:""; mso - padding - alt:0in 5.4pt 0in 5.4pt; mso - para - margin - top:0in; mso - para - margin - right:0in; mso - para - margin - bottom:10.0pt; mso - para - margin - left:0in; line - height:115%; mso - pagination:widow - orphan; font - size:14.0pt; mso - bidi - font - size:15.0pt; font - family:SutonnyMJ;}

Explanation:

If n is an even positive integer and K +2 =3n , which of the following could be a value of k? Correct Answer 4 Here n is an even positive integer, So, let the value of n is 2. Here, K + 2 = 3n ð K + 2 = 32 ð K = 6 - 2 ð K = 4 v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} Normal 0 false false false EN - US X - NONE X - NONE /* Style Definitions */ table.MsoNormalTable {mso - style - name:"Table Normal"; mso - tstyle - rowband - size:0; mso - tstyle - colband - size:0; mso - style - noshow:yes; mso - style - priority:99; mso - style - parent:""; mso - padding - alt:0in 5.4pt 0in 5.4pt; mso - para - margin - top:0in; mso - para - margin - right:0in; mso - para - margin - bottom:10.0pt; mso - para - margin - left:0in; line - height:115%; mso - pagination:widow - orphan; font - size:14.0pt; mso - bidi - font - size:15.0pt; font - family:SutonnyMJ;}

Explanation:

The average of 6 numbers is 8.5 , when one number is discarded the average of the remaining numbers becomes 7.2 .what is the discarded number? Correct Answer 15 The average of 6 numbers is 8.5 So, the sum of 6 numbers is 8.5x6 or 51 The average of 5 numbers is 7.2 So, the sum of 5 numbers is 7.2x5 or 36 So, the discarded number is 51 - 36 or 15 Normal 0 false false false EN - US X - NONE X - NONE /* Style Definitions */ table.MsoNormalTable {mso - style - name:"Table Normal"; mso - tstyle - rowband - size:0; mso - tstyle - colband - size:0; mso - style - noshow:yes; mso - style - priority:99; mso - style - parent:""; mso - padding - alt:0in 5.4pt 0in 5.4pt; mso - para - margin - top:0in; mso - para - margin - right:0in; mso - para - margin - bottom:10.0pt; mso - para - margin - left:0in; line - height:115%; mso - pagination:widow - orphan; font - size:14.0pt; mso - bidi - font - size:15.0pt; font - family:SutonnyMJ;}

Explanation:

If 18 is 15 percent of 30 percent of a certain number, what is the number? Correct Answer 400 Let, the number = x = > x × 30% × 15% = 18 = > x = ( 18 × 100 × 100) /30×15 = 400

Explanation:

Maria Purchased brand X pens for Tk. 4.00 apiece and brand Y pens for Tk. 2.80 apiece. If Maria purchased a total of 12 of those pens for Tk. 42.00 ,how many brand x pens did she purchase? Correct Answer 7 Let,    number of X brand pens that she purchased = P         number of Y brand pens that she purchased = 12-Pnow, 4P + 2.80(12-P) = 424P + 33.6 - 2.80P = 421.2P = 8.4P = 7so, number of X brand pens that she purchased = 7 (Ans.)

Explanation:

A rectangular box is 10 inches wide, 10 inches long and 5 inches high. what is the greatest possible distance, in inches ,between any two points on the box? Correct Answer 15 আয়তাকার বক্সটির width (a) = 10 inch; length (b) = 10 inch এবং height (c) = 5 inch দুটি বিন্দুর মধ্যকার greatest distance (সর্বোচ্চ দূরত্ব) বা কর্ণ d - এর মান বের করতে হবে।  আমরা জানি,  ঘণবস্তুর কর্ণের দৈর্ঘ্য  (d) = ✓(a² + b² + c²)       = ✓(10² + 10² + 5²)       = ✓225       = 15

Explanation:

If the population of a certain country increases at the rate of one person every 15 second, by how many persons does the population increase in 20 minutes? Correct Answer 80 Population increased in 15 sec = 1  Population increased in 60 sec or 1 min = 1×4 = 4  Population increased in 20 min = 4×20 = 80

Explanation:

A rope of 40 feet long is cut into two pieces. If one piece is 18 feet longer than the other, what is the length, in feet, of the shorter piece? Correct Answer 11 Let x = the length of the shorter piece So, x + 18 = the length of the longer piece Since the lengths of the two pieces must add to 40 feet, we can write: x + (x + 18) = 40 = > 2x + 18 = 40 = > 2x = 40 - 18 = > 2x = 22 ∴ x = 11

Explanation:

The cost of picture frame M is Tk. 10.00 less than 3 times the cost of picture frame N. If the cost of frame M is Tk. 50.00, what is the cost of frame N? Correct Answer Tk. 20.00 Cost price of N = x Cost price of M = 3x - 10 3x - 10 = 50 = > 3x = 60 = > x = 60/3 ∴x = 20

Explanation:

A 10% monthly salary increase resulted in a Tk. 9,000 per year increase in salary for an employee. What was his monthly salary before the increase? Correct Answer Tk. 7,500 Yearly increase = 9000 tk   Monthly increase = 9000/12 = 750 tk 10% of Salary is = 750 tk 100% of Salary is = (750×100)/10 = 7500 tk

Explanation:

The average of four consecutive odd positive integers is always --- Correct Answer an even number example: 1 + 3 + 5 + 7 = 16 average = 16/4 = 4 even number

Explanation:

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 Let Previous price of a mango was tk x So, current price of a mango is x(80%) or tk 4x/5 ATO, 75/(4x/5) = 75/x + 5 = > 20x + 300 = 375 = > x = 15/4 So, the current price of dozen of mango is 12 x 4/5 x 15/4 or tk 36.

Explanation:

The organizers of a fair projected a 25 percent increase in attendance this year over that of last year, but attendance this year actually decreased by 20 percent . what percent of the projected attendance was the actual attendance? Correct Answer 64% Let, last year present = 100 this year projected present = (100 + 25) = 125 this year Actual present = (100 - 20) = 80 so, the percentage = ((80/125)*100)% = 64%

Explanation:

If the following series continues to follow the same pattem, what will be the next number : 2, 6, 3, 9, 6----- Correct Answer 18 in each pair, 2nd number is three times of 1st number, so blank number = 6*3 = 18

Explanation:

The Value of -3 -(-10) is greater than the value of -10 -(-3) by Correct Answer 14 -3-(-10)=-3+10=7•••••••(1)And,-10-(-3)=-10+3=-7••••••(2)Now, difference between (1)and(2)=7-(-7)=7+7=14Answer:14

Explanation:

An empty swimming pool with a capacity of 5,760 gallons is filled a rate of 12 gallons per minute. How many hours does it take to fill the pool to capacity? Correct Answer 8 Filled 12 gallons in 1 min Filled 5760 gallons in = 5760 /12 min = 5760/( 12 ×60) hours = 8 hours

Explanation:

If x=3 and (x-y)2=4, then y could be ---- Correct Answer 1 দেওয়া আছে, x = 3 প্রদত্ত রাশি, (x - y)2 = 4 (3 - y)2 = 4 [ x এর মান বসিয়ে] 6 - 2y = 4 –2y = 4 - 6 - 2y = –2 y = –2/ - 2 y = 1 আশা করি বুঝতে পারছেন ধন্যবাদ

Explanation:

Of the 65 cars on a car lot, 45 have air conditioning, 30 have power windows, and 12 have both air conditioning and power windows. how many of the cars on the lot have neither air conditioning nor power windows? Correct Answer 2 Cars having atleast one of the facilities = 45 + 30 - 12 = 63 Cars having neither of the facilities = 65 - 63 = 2

Explanation:

If 8 dozens of bananas are purchased at the rate of Taka 30 per dozen and 12 dozens are purchased at Taka 25 per dozen, what rate per dozen it should be sold to make a profit of Taka 3 per dozen? Correct Answer Taka 30 Total dozens of bananas bought = 8 + 12 = 20 dozens Total cost = 8×30 + 12×25 = 240 + 300 = 540 TK Cost per dozen = 540/20 = 27 TK Selling price per dozen at a profit of TK 3 per dozen = 27 + 3 = 30 TK

Explanation:

Cheese, egg and beef sandwiches were made for a picnic in a ratio of 5 to 7 to 8. If a total of 120 sandwiches were made, how many egg sandwiches were made ? Correct Answer 42 Egg Sandwiches = (120*7)/20 = 42

Explanation:

Saif, Dr. Nazma and Shakil divided a sum of money among themselves in the ratio 2:3:7 . Find the share of Saif if the total share of Saif and Dr. Nazma together is TK. 1500 less than that of Shakil. Correct Answer TK. 15000 [ বি. দ্র. : প্রশ্নে সঠিক উওর দেয়া নাই। সঠিক উওর হবে ১৫০০ টাকা। যেখানে মোট টাকার পরিমাণ ৯০০০ টাকা, সেখানে সাইফের অংশ কোনভাবেই ১৫০০০ হওয়া সম্ভব নয়। নিচে এর ব্যাখ্যা দেয়া হল...] ধরি, মোট টাকার পরিমাণ x আনুপাতিক রাশিগুলোর যোগফল = 2 + 3 + 7 = 12 সাইফের অংশ = x এর 2/12 = x/6 ডা. নাজমার অংশ = x এর 3/12 = x/4 শাকিলের অংশ = x এর 7/12 = 7x/12 প্রশ্নমতে, 7x/12 - ( x/6 + x/4) = 1500 = > 7x/12 - 5x/12 = 1500 = > 2x/12 = 1500 = > x/6 = 1500 = > x = 9000 মোট টাকার পরিমাণ 9000 টাকা৷ সাইফের অংশ = x/6 = 9000/6 = 1500 টাকা (উওর) ডা. নাজমার অংশ = x/4 = 9000/4 = 2250 টাকা শাকিলের অংশ = 7x/12 = 7*9000/12 = 5250 টাকা 1500 + 2250 + 5250 = 9000 টাকা। সে হিসেবে আমার মতামত, এই প্রশ্নের অপশনে ভুল আছে। সঠিক উওরটি নেই। সঠিক উওর হবে ১৫০০ টাকা।

Explanation:

An item costs 90% of its original price. If Tk. 90 is added to the discount price, the cost of the item will be equal to its original price. What is the original price of the item? Correct Answer Tk. 900 Let original cost price is 100% Item cost peice is 90% Discount = (100 - 90)% = 10% ATQ 10% = 90 100% = 900 Ans. 900 TK

Explanation:

A football team plays 154 games in a year. If till July the team has won 40 and lost 20 games , how many of the remaining games the team must win to finish the year winning nearly 50% of the games ? Correct Answer 37 50% of the games = 50% of 154 = 50/100×154 = 77 Number of games the team must win = 77 - 40 = 37

Explanation:

If mx+ny=12my, then x/y+n/m= ? Correct Answer 12 mx + ny = 12my mx + ny/my = 12 mx/my + ny/ my = 12 x/y + n/m = 12 এখানে, ১২ কে ফ্রি করার জন্য my দ্বারা উভয় পক্ষে ভাগ করে দেওয়া হয়েছে। তারপরে mx ও my পাবে এবং ny ও my পাবে তাই দুইটার নিচে দেওয়া হয়েছে এবং m আর m কাটে এবং y আর y কাটে। আশা করি বুঝতে পারছেন ধন্যবাদ

Explanation:

A merchant sells a radio for Tk. 80 and thereby makes a profit of 25% of the cost. What is the ratio of cost to selling price? Correct Answer 4/5 at 25% profit, if cost price = 100, then sell price = 125 now, if sell price = 80, then cost price = (100*80)/125 = 64 so ratio = 64/80 = 4:5