Explanation:

Tow numbers A and B are such that the sum of 5% of A and 4%of B is two-third of the sum of 6% of A and 8%of B. Find the ratio of A : B . Correct Answer 4 : 3 5% of A + 4% of B = ( 6% of A + 8% of B) × 2/3 .05A + . 04B = (. 06A + . 08B) × 2/3 .15A + . 123 = . 12A + . 16B .03A = . 04B A/B = . 04/.03 A : B = 4 : 3

Explanation:

How many times in a day, are the hands of a cock in straight line but opposite in direction ? Correct Answer 22 Its a general knowledge type question. Though one can calculate it by thinking, its 22 tims.

Explanation:

A student was asked to find the arithmetic mean of the numbers 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14, and x. He found the mean to be 12. What should be the number in place of x ? Correct Answer 7 (3 + 11 + 7 + 9 + 15 + 13 + 8 + 19 + 17 + 21 + 14 + x)/12 = 12 137 + x /12 = 12 x = 144 - 137 x = 7

Explanation:

Find the smallest number by which 5808 should be multiplied so that the product becomes a perfect square . Correct Answer 3 5808 = ( 4 × 4) ( 11 × 11) × 3 = 42 × 112 × 3 We need another 3 to make it a full square.

Explanation:

A takes twice as much time as B or thrice as much time as C to finish a piece of work . Working together , they can finish the work in 2 days . B can do the work alone in : Correct Answer 6 days Let's assume, A can do the work in x days B can do the work in x/2 days C can do the work in x/3 days Together they in 1 day do = ( 1/x + 2/x + 3/x) portion Now, 1/x + 2/x + 3/x = 1/2 1 + 2 + 3/x = 1/2 x = 12 B can do the work in = 12/2 = 6 days

Explanation:

2, 5, 9, 19, 37, ? Correct Answer 75 Here, 2 × 2 + 1 = 5 5 × 2 - 1 = 9 9 × 2 + 1 = 19 19 × 2 - 1 = 37 37 × 2 + 1 = 75

Explanation:

Z, U, Q, ?, L Correct Answer N ইংরেজি 26 টি letrer এর সর্বশেষ lerrer Z, এরপর 4 টি বাদ দিয়ে পরের letrer U, এর পরে 3 টি বাদ দিয়ে Q, এর পরে 2 টি বাদ দিয়ে N, পরে 1 টি বাদ দিয়ে L নির্ণয় হয়েছে।

Explanation:

Rahim ranks seventh from the top and twenty-sixth from the bottom in class . How many students are there in the class ? Correct Answer 32 7 + 26 - 1 = 32 [ Rahim is counted twice , once in 7th again in 26 th]

Explanation:

When you see a blind man trying to cross the road , you Correct Answer go and help him Because a blind person can't see. So that he might be in danger. You should go and help him instead of watching what's going on.

Explanation:

Arrange the following in a meaningful sequence : Correct Answer Recovery Illness - Doctor - Consultation - Treatment - Recovery So correct answer : Recovery

Explanation:

If A > B, B > C and C > D, then which of the following conclusions is definitely wrong ? Correct Answer D > A How, A > B > C >D so, D >A is wrong

Explanation:

If X is brother of son of Y's son, then how is X related to Y ? Correct Answer Grandson son of Y's son is Y's Grandson brother of grandson is also a grandson. so, X is Y's grandson.

Explanation:

Peter purchased a machine for TK. 80,000 and spent TK. 5,000 on repair and TK. 1,000 on transport and sold it with 25% profit , At what price did he sell the machine ? Correct Answer TK.1,07,500 Total expense = ( 80, 000 + 5, 000 + 1, 000) = 86, 000Tk At 25% profit, Selling price = 86, 000 + 86, 000 × 25/100 = 1, 07, 500

Explanation:

If 0.4 of a number is equal to 0.06 of another number, the ratio of the numbers is : Correct Answer 3:20 .04 of x = . 06 of y x/y = . 06/.4 x/y = 3/20 x : y = 3 : 20

Explanation:

Among P, Q, R, S and T, Q is the second tallest and S is immediate taller than the shortest . Who among them is in the middle when they stand in the order of their heights ? (1). T is not the shortest (2). R is taller than S but shorter than Q . (3). P ranks third in height above S when all are arranged in the order of height . Correct Answer Only 2 This Question does not make any sense. In the question , it is asked who among P, Q, R, S, and T is in the middle , But the options are different.

Explanation:

The breadth of a rectangular field is 60% of its length . If the perimeter of the field is 800 m, what is the area of the field ? Correct Answer 37500 sq.m Let, length = 100x meter, breadth = 60x meter Perimeter = 2 ( length + breadth) 800 = 2 ( 100x + 60x) 800 = 320x x = 5/2 area = ( 100 × 5/2) × ( 60 × 5/2) = 37500 sq.metre

Explanation:

Which letter in the alphabet is as far from G as T is from M ? Correct Answer N T is 6 letters from M So, 6 letters from G is N

Explanation:

Which of the following fractions is greater than 3/4 and less than 5/6 ? ? Correct Answer 4/5 4/5 is greater than 3/4 and less than 5/6 L.C.R of 4, 6, 3, 5, 10, 2, is 60.50 converting all denominator into Now, ( 3 × 15)/(4 × 15) = 45/60 5 × 10/6 × 10 = 50/60 2 × 20 / 3 × 20 = 40/60 4 × 12 / 5 × 12 = 48/60 9 × 6 / 10× 6 = 54 /60 1 × 30 / 2 × 20 = 30/60 So, we see 45/60< 48/60 > 50/60

Explanation:

Sumon buys a pen and a pencil for Tk. 55. If the pen costs Tk. 25 more than the pencil, how much does the pencil cost? Correct Answer 15 Let, cost of pencil be x. So, cost of pen = x + 25 x + x + 25 = 55 2x = 30 x = 15

Explanation:

Jamal has half the marbles that Malek has. Arif has 3 times as many as Jamal. together they have 72. How many marbles does Jamal have? Correct Answer 12 Ler, jamal has x marbles Malek has 2x marbles Arif has 3x marbles x + 2x + 3x = 72 6x = 72 x = 12

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:

Kalam loves chocolates. He can eat 32 of them in an hour. His brother Jamal needs 3 hours to eat the same amount. How long will it take them together to eat 32 chocolates? Correct Answer 45 mins In 1 hour kalam can eat 32 chocolates In 1 hour jamal can eat 32 /3 chocolates In 1 hour they both can eat ( 32 + 32 / 3) chocolates = 128/3 chocolates 128/3 chocolates eat both of them in 1 hour 32 chocolates eat both of them in = 3 × 32 /128 × 60 min = 45 min

Explanation:

Two-fifths of the caps in a box are red, one-fourth are blue and the rest are green. What is the ratio of the green caps to the blue caps? Correct Answer 5 : 8 2/5 th rwd, 1/4 th blue Rest = ( 1 - 2/5 - 1/4) = 7/20th green Green : Blue = 7/20 : 1/4 = 7 : 5

Explanation:

Six men can complete a work in 5 days if they work for 8 hours per day. How many days will 4 men take to do the same work if they work only 5 hours per day? Correct Answer 12 6 men if works 8 hours /day need 5 days 4 men if works 5 hours/day need = ( 5×6×8)/ 4×5 = 12 days

Explanation:

The total fare for 2 adults and 3 children on a bus is Tk. 210. If a child's fare is half of that of an adult, what is the fare of an adult? Correct Answer 60 Let, fare of an adult be 2x Fare of a child i x. So, 2 × 2x + 3 × x = 210 Which gives, 2x = 60

Explanation:

If Munir gave Babu Tk. 8 and Babu gave Chinu Tk. 5, the three of them would have the same amount of money. How much more does Babu have than Chinu? Correct Answer Tk. 3 x - 8 = y + 3 = z + 5 y - z = z + 5 - 3 - z = 2

Explanation:

A television producer sold 150 televisions in a special 6-day sale offer. During the sale offer, each day the company sold 6 more televisions than what was sold the day before. How many televisions were sold on the 6th day? Correct Answer 40 Sum = n/2 [ 2a + ( n – 1) d ] বা, 150 = 6/2 [ 2 × x + ( 6 - 1) × 6 ] বা, 300 = 6 [ 2x + 30 ] বা, 300 = 12x + 180 বা, x = 10 Sell at 6th day = 10 + ( 6 - 1) 6 = 10 + 30 = 40

Explanation:

If the sum of four consecutive even integers is s, what is the greatest of the integers in terms of s? Correct Answer (s+12)/2 একটা চিন্তা করে দেখেন S কে চার দিয়ে ভাগ করলে ২য় ও ৩য় even number এর মাঝের integer টা আসবে। ( 2 + 4 + 6 + 8 = 20/4 = 5) 4th one is s/4 + 3 = s + 12 /4

Explanation:

Jafar is n years old. Moin in 5 years younger than Jafar and 3 years older than Arif. What is the sum of the ages of all three? Correct Answer 3n - 13 Jafor = n years old So, Moin = ( n - 5) years old So, Arif = ( n - 5 - 3) or ( n – 8) years old Sum of these ages = ( n + n - 5 + n - 8) = 3n - 13

Explanation:

For how many years does a person need to invest his Tk. 3,000 at 7% to earn Tk. 420 in simple interest? Correct Answer 2 years 1 year interest of Tk. 3, 000 = 7% × 30 = Tk.210 years needed = 420/210 = 2 years

Explanation:

Which of the following is equal to 0.45? Correct Answer 45% (. 45 × 100) = 45 %

Explanation:

If the perimeter of a rectangular house is 44 yards, and the length is 36 feet, what is the width of the house? Correct Answer 10 yards Perimeter দেয়া আছে কিন্তু yard এ। অনেকে feet হিসাব করে Let, width be x 2 ( 36 + x) = 44 × 3 বা, 36 + x = 66 বা, x = 30 feet of 10 days

Explanation:

A retail buyer purchases 15 white dress shirts for Tk 1000 and 5 striped dress shirts for Tk 400. At what average price (in Tk) the retailer should sell a dress shirt if he wants to make a profit of Tk 50 each shirt? Correct Answer 110 Total cost = 1000 + 400 = Tk.1400 Total shirts = 15 + 5 = 20 Total profit = 20 × 50 = Tk. 1000 Total selling price = 1400 + 1000 = Tk. 2400 Price = 2400/20 = Tk.120

Explanation:

The average of 20, 70 and x is 40. If the average of 20, 70, x and y is 50, then y=? Correct Answer 80 20 + 70 + x = 3 × 40 বা, x = 30 20 + 70 + 30 + y = 200 বা, y = 80

Explanation:

পিতা ও পুত্রের বর্তমান বয়সের সমষ্টি ৮৪ বছর। দশ বছর পূর্বে তাদের বয়সের অনুপাত ৫ঃ৩ থাকলে , ১০ (দশ) বছর পর এ অনুপাত কি হবে? সঠিক উত্তর ১৫ : ১১ ১০ বছর পূর্বে বয়সের অনুপাত ছিল ৫ঃ৩ ধরি, পিতার বয়স x বছর পুত্রের " (৮৪ - x) " ১০ বছর পূর্বে তাদের বয়স ছিল যথাক্রমে (x - ১০) ও (৮৪ - x - ১০) বছর প্রশ্নমতে, x - ১০/৮৪ - x - ১০ = ৫/৩ বা, x - ১০/৭৪ - x = ৫/৩ বা, ৩x - ৩০ = ৩৭০ - ৫x বা, ৩x + ৫x = ৩৭০ + ৩০ বা, ৮x = ৪০০ x = ৪০০/৮ = ৫০ অর্থাৎ বর্তমান পিতার বয়স ৫০ বছর ও পুত্রের ৩৪ বছর । ১০ বছর পর তাদের অনুপাত ৫০ + ১০ঃ ৩৪ + ১০ = ৬০ঃ৪৪ = ১৫ঃ১১

Explanation:

68% of the candidates in a recruitment test have passed the written part of it. The number is 14 less than what would have been in case 75% would have passed. What was the number of candidates appeared? Correct Answer 150 75% - 68% = 7% 7% = 14 100% = 14 × 100% / 7% = 200

Explanation:

An emergency vehicle travels 10 miles at a speed of 50 miles per hour. How fast must the vehicle travel on the return trip if the round trip travel time is 20 minutes? Correct Answer 55 mph 50 miles travel in 60 minutes 10 miles travel in ( 60×10)/50 = 12 min Now, 20 - 12 = 8 min In 8 minutes it has to go 10 miles In 1 minutes it has to go 10/8 miles In 60 minutes it has to go ( 10×60)/8 = 75 mph

Explanation:

A number is multiplied by 4 and then the product is divided by 100. This same result can be obtained if the original number is divided by --- Correct Answer 0.04 x × 4 /100 = x/25 x ÷ x/25 = 25

Explanation:

After paying 10% tax on all income over Tk 3000, Rahim had a net income of Tk 12,000. Rahim's income before tax (in Tk) was ---- Correct Answer 12,900 12, 000 - 3, 000 = 9, 000 10% tax, if after tax income Tk.90 before tax income Tk.100 If after tax income Tk. 9000 before tax income Tk. = ( 100× 9000)/90 = 10, 000 Before tax income = 10, 000 + 3, 000 = Tk.13, 000

Explanation:

If a : b is 4 : 7 and b : c is 5 : 6, then a : b : c is --- Correct Answer 20 : 35 : 42 a : b = 4 : 7 = 20 : 35 b : c = 5 : 6 = 35 : 42 a : b : c = 20 : 35 : 42

Explanation:

If 30% of A =0.25 of B=1/5th of C, the ratio of A, B and C is ---- Correct Answer 3 : 6 : 5 A × 30% = B ×.25 = 1/5 ×C .3A = . 25B = . 2C .3A = . 25B A/B = 25/30 A/B = 5/6 A : B = 5 : 6 A : B = 10 : 12 and, . 25B = . 20C B/C = 20/25 B/C = 4/5 B : C = 4 : 5 B : C = 12 : 15 A : B : C = 10 : 12 : 15

Explanation:

Find the value of (0.1 * 0.01 * 0.001) / (0.2 * 0.02 * 0.002) Correct Answer 14 (0.1 × 0.01 × 0.001) / ( 0.2 ×0.02 × 0.002) = 1/8 = 0.125 সঠিক উত্তর অপশনে নাই

Explanation:

ধান ও ধান থেকে উৎপন্ন চালের অনুপাত ৪ : ৩ এবং গম ও গম থেকে উৎপন্ন সুজির অনুপাত ৫ : ৪ হলে, ১ কুইন্টাল ধান থেকে উৎপন্ন চাল ও ১ কুইন্টাল গম থেকে উৎপন্ন সুজির অনুপাত নির্ণয় করুন। সঠিক উত্তর ১৫ : ১৬ ১ কুইন্টাল = ১০০ কেজি ১ কুইন্টাল ধান থেকে উৎপন্ন চাল = ৩/৪ x ১০০ = ৭৫ কেজি ১ কুইন্টাল গম থেকে উৎপন্ন সুজি = ৪/৫ x ১০০ = ৮০ কেজি সুতরাং, চাল : সুজি = ৭৫ : ৮০ = ১৫ : ১৬

Explanation:

If Tk. 4500 was invested in a share when the price per share was Tk. 90 and Tk. 30,000 was invested when the price per share was Tk. 60, what was the average price per share prchased? Correct Answer Tk. 80 Total number of share = 4500/90 + 30000/60 = 50 + 500 = 550 Average price per share = ( 4, 500 + 30, 000)/550 = Tk.62.73

Explanation:

One-half of the employees of a company earns over Tk. 18,000 per month. One-third of the reminder earns between Tk. 15,000 and Tk. 18,000. What part of the staff earns below Tk. 15,000? Correct Answer one-sixth 1/2 + 1/2 × 1/3 = 1/2 + 1/6 (3 + 1) / 6 = 4/6 = 2/3 1 - 2/3 = 1/3 ( one - third)

Explanation:

If x=5y =16 and x=-3, then the value of y is ---- Correct Answer -24 x = 5y = 16 5y = 16 y = 16/5 = 3.2 Again, 5y = x = - 3 y = - 3/5 = - 0.6 সঠিক উত্তর অপশনে নাই

Explanation:

A figure was reached by first multiplying a number by 4 and then dividing the product by 100. The figure can be obtained by dividing the original number by Correct Answer 0.04 x × 4 /100 = x /25

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:

Two numbers are respectively 20% and 50% more than a third number. The ratio of two number is - Correct Answer 4:5 Let, third number is x. সুতরাং, 1st number = x + 20100x = 65x 2nd number = x + 50100x = 32x so Ratio of two number = 65X : 32X = 4:5

Explanation:

The average of x and y is 40 and that of y and z is 35. What is the value of x-z? Correct Answer 5 Total x & y = 80 Total y & z = 70 ( x + y) - ( y + z) = 80 - 70 x - z = 10