mathematics MCQs
Showing 50 questions (Total: 16798)
x+3=x+3 হলে x = কত?
Correct Answer:
Correct Answer:
Explanation:
x+3=x+3 হলে x = কত? সঠিক উত্তর L.S = √(x + 3) = √(0 + 3) = √3 R.S = √x + √3 = √0 + √3 = √3 Ans: x = 0
একটি গাড়ির চাকা প্রতি মিনিটে ৯০ বার ঘুরে । এক সেকেন্ডে চাকাটি কত ডিগ্রি ঘুরে?
Correct Answer:
ঘ: ৫৪০°
Explanation:
একটি গাড়ির চাকা প্রতি মিনিটে ৯০ বার ঘুরে । এক সেকেন্ডে চাকাটি কত ডিগ্রি ঘুরে? সঠিক উত্তর ৫৪০° ১ মিনিট বা ৬০ সেকেন্ডে ঘুরে = ৯০ বার ১ সেকেন্ডে ঘুরে = ৯০/৬০ = ৩/২ বার এখানে, ১ বারে ঘুরে = ৩৬০০ ৩/২ বারে ঘুরে = ( ৩৬০০ × ৩) /২ = ৫৪০০
১, ২৭, ১২৫----ধারাটির পরবর্তী সংখ্যাটি কত?
Correct Answer:
ঘ: ৩৪৩
Explanation:
১, ২৭, ১২৫----ধারাটির পরবর্তী সংখ্যাটি কত? সঠিক উত্তর ৩৪৩ ১, ২৭, ১২৫, ৩৪৩ ১৩ , ৩৩ , ৫৩ , ৭৩ সুতরাং পরবর্তী সংখ্যা হলো ৩৪৩।
ধান ও ধান উৎপন্ন চালের অনুপাত ৪ঃ৩ এবং গম ও গম থেকে উৎপন্ন সুজির অনুপাত ৫ঃ৪ হলে ১ কুইন্টাল ধান থেকে উৎপন্ন চাল ও ১ কুইন্টাল গম থেকে উৎপন্ন সুজির অনুপাত কত?
Correct Answer:
খ: ১৫:১৬
The average daily wages of female worker in a factory is Tk. 30 and that of male workers is Tk.42 .If the average wages of all the woekers is Tk.37, what is the ratio of male to female workers ?
Correct Answer:
C: 7:5
একটি আয়তক্ষেত্র ও একটি বর্গক্ষেত্রের পরিসীমা পরস্পর সমান। যদি আয়তক্ষেত্রের প্রস্থ তার দৈর্ঘ্যের অর্ধেক হয় তবে বর্গক্ষেত্র ও আয়তক্ষেত্রের ক্ষেত্রফলের অনুপাত কত?
Correct Answer:
ঘ: ৯ : ৮
Explanation:
একটি আয়তক্ষেত্র ও একটি বর্গক্ষেত্রের পরিসীমা পরস্পর সমান। যদি আয়তক্ষেত্রের প্রস্থ তার দৈর্ঘ্যের অর্ধেক হয় তবে বর্গক্ষেত্র ও আয়তক্ষেত্রের ক্ষেত্রফলের অনুপাত কত? সঠিক উত্তর ৯ : ৮ ধরি, আয়তক্ষেত্রের দৈর্ঘ্য = ২ক একক প্রস্ত = ক একক পরিসীমা = ২ ( ২ক + ক) একক = ৬ক একক। বর্গক্ষেত্রের পরিসীমা = ৬ক বর্গক্ষেত্রের একবাহু = ৬ক/৪ = ৩ক/২ এখন, বর্গক্ষেত্রের ক্ষেত্রফল = ( ৩ক/২)২ = ৯ক২/৪ আয়তক্ষেত্রের ক্ষেত্রফল = ২ক × ক = ২ক২ বর্গক্ষেত্রের ক্ষেত্রফল / আয়তক্ষেত্রের ক্ষেত্রফল = ( ৯ক২/৪) / (২ক২) = ৯/৮ = ৯ : ৮
To reproduce an old photograph, a studio charges Tk. z to make anegative, Tk. 0.6z for each of the first 10 prints, and Tk. 0.2z. for each print in excess of 10 prints. If Tk. 45 is the total charge to make one nagative and 20 prints from an old photograph then what is the value of z?
Correct Answer:
D: Tk.5
Explanation:
To reproduce an old photograph, a studio charges Tk. z to make anegative, Tk. 0.6z for each of the first 10 prints, and Tk. 0.2z. for each print in excess of 10 prints. If Tk. 45 is the total charge to make one nagative and 20 prints from an old photograph then what is the value of z? Correct Answer Tk.5 Let 1st cost (C1) = z C2 = .6z×10 = 6z C3 = .2z×10 = 2z Totat cost = c1 + c2 + c3 = 9z ATQ 9z = 45 z = 45/9 = 5 Ans. 5
If both 132and 33 are factors of the number 43×62×z×811 then what is the smallest possible value of z?
Correct Answer:
A: 507
The cost of manufacturing x water pumps is Tk.9000+400x. The amount received by selling these x water pumps is Tk. 500x. What is the least number of water pumps that must be manufactured and sold so that that the amount recieved is at least equal to the manufacturing cost ?
Correct Answer:
C: 90
Explanation:
The cost of manufacturing x water pumps is Tk.9000+400x. The amount received by selling these x water pumps is Tk. 500x. What is the least number of water pumps that must be manufactured and sold so that that the amount recieved is at least equal to the manufacturing cost ? Correct Answer 90 9000+400x = 500xor, 9000 = 500x - 400xor, 9000 = 100xor, x = 9000/100x = 90
4a2+1a2=2 হয়, তবে 8a3+1a3 এর মান কত?
Correct Answer:
Correct Answer:
3.0032.002=?
Correct Answer:
A: 1.05
The ratio of 15 to 27______ is
Correct Answer:
D: 7 : 10
Explanation:
The ratio of 15 to 27______ is Correct Answer 7 : 10 Let, 1/5 = a 2/7 = b According to the question, 1/5 : 2/7 = a:b Or, a/b = 1/5 ÷ 2/7 Or, a/b = 1/5 × 7/2 Or, a/b = 7/10 Or, a:b = 7:10
Three math classes , X, Y , and Z, take an algebra test. The average score in class X is 83. The average score in class Y is 76. The average score in class Z is 85. The average score of all students in classes X and Y together is 79. The average score of all student classes Y and Z together is 81. What is the average for all the three classes?
Correct Answer:
B: 81.5
What is the effective rate of interest of a lump that is compounded quarterly at 12% annually ?
Correct Answer:
A: 10.25%
Explanation:
What is the effective rate of interest of a lump that is compounded quarterly at 12% annually ? Correct Answer 10.25% F=(1+.12/4)^4-1=(1.03)^4-1=1.1255-1=.1255×100=12.55
If u>t, r>q, s>t, t>r, which of the following must be true? I. u>s II. s>q III. u>r
Correct Answer:
A: I only
The price of each mango is 65 taka and the price of each guava is 45 taka. Aslam buys total to mangoes and guavas at an average price of 56 taka. How many mangoes must Aslam put back and replace with guavas so that the average price of the pieces of fruit that he keeps is 52 taka?
Correct Answer:
A: 1
If P/Q <1, and P and Q are positive integers, which of the following must be greater than 1 ?
Correct Answer:
A: P/Q
If y(4x-24)=y and y not = 0, then x =?
Correct Answer:
A: 23
If the ratio of the areas of 2 squares is 2:1 , then the ratio of the perimeters of the squares is
Correct Answer:
B: 2 : 1
A certain suit's price was reduced by 25% in the first week and 20% in next week. In the third week, the shop owner decided to offer additional 10% discount on the suit. What percent of the regular price was the final price of the suit after the two reductions?
Correct Answer:
B: 54%
Of the total no. of oranges that arrive at a juice company, 20% by weight is rejected before processing. Of the oranges that are processed, 15% by weight is rejected before being juiced. Of the oranges that are juiced, 25% are wasted as a result of juice making . Of the oranges, those arrive at the company, what percent by weight is juiced?
Correct Answer:
D: 51
A discount series of 10% , 15% and 20% is equal to a single discount of :
Correct Answer:
A: 38.8%
Explanation:
A discount series of 10% , 15% and 20% is equal to a single discount of : Correct Answer 38.8% Let, the original price = 100 Atfirst, at 10% discount the price become 100 - 10/100 × 100 = 90 Again, at 15 % discount, 90 - 15/100 × 90 = 76.5 Again, at 20% discount 76.5 - 76.5 × 20/100 = 61.2 So originally discount = 100 - 61.2 = 38.8
In a batch of 500 students, forty percent are girl. Twenty-five percent of the boys and half of the girls agreed to go for a study tour. What percentage of the entire batch did not sign up for the tour?
Correct Answer:
A: 35%
If x≥ 10 and y ≥ 12, then which of the following must be true?
Correct Answer:
A: (x+y)≤22
An empty bucket being filled with paint at a constant rate takes 6 minutes to be filled to 710 of its capacity. How much more time will it take to fill the bucket to full capacity?
Correct Answer:
A: 2 minutes
Explanation:
An empty bucket being filled with paint at a constant rate takes 6 minutes to be filled to 710 of its capacity. How much more time will it take to fill the bucket to full capacity? Correct Answer 2 minutes Rest of the capacity of bucket( 1 - 7/10) = 3/10 part . Here, 7/10 part fill in 6 minutes 1 part fill in (6*10)/7 minutes 3/10 part fill in (10*6*3)/7*10 = 2.57 minutes
A cube has a volume of 8M3 . If each side is doubled is length, what will be its new volume ?
Correct Answer:
A: 16M3
The maximum number of partners in a partnership business is____
Correct Answer:
A: 5
Explanation:
The maximum number of partners in a partnership business is____ Correct Answer 5 Partnership business বা অংশীদারি ব্যবসায় ব্যংকিং ক্ষেত্রে সর্বোচ্চ ১০ জন এবং সাধারণ ব্যবসায় সর্বোচ্চ ২০ জনের বেশি অংশীদার বা মালিক থাকতে পারে না।
If the length and width of a rectangle garden plot were each increased by 20% , what would be the percent increase in the area of plot ?
Correct Answer:
A: 20%
A taxi charges Taka 50 for the first 2 kilometers and Taka 20 for each additional kilometer. How much would be the fare for 32 kilometers?
Correct Answer:
A: 780
Explanation:
A taxi charges Taka 50 for the first 2 kilometers and Taka 20 for each additional kilometer. How much would be the fare for 32 kilometers? Correct Answer 780 ভিটামিন "এ" এর অভাবে রাতকানা রোগ হয়ে থাকে। রাতকানা রোগীরা দিনের আলোতে স্বাভাবিক ভাবেই চলাচল করতে পারে কিন্তু রাতের বেলা অনেক সময়ে সমস্যা হয়। অনেকে একেবারে দেখে না আবার অনেকে ভুল দেখে ।
Suppose that each widget sells for Tk. 150. What is the profit earned by AC Ltd. in July ? ( Profit is defined as the excess of sales revenue over total cost.)
Correct Answer:
Correct Answer:
Explanation:
Suppose that each widget sells for Tk. 150. What is the profit earned by AC Ltd. in July ? ( Profit is defined as the excess of sales revenue over total cost.) Correct Answer It is know that for 40 units production cost is 6000 art at 150 tk. per unit, the total revenue would also be 600 Tk. Thus the total profit would be 0.
Using the three sides given, which triangle is a right triangle?
Correct Answer:
D: ∆IV:112,2,212
A year ago the price of a toothbrush and the price of a comb were both Tk.50. The price of the toothbrush was increased by 20% while the price of the comb was decreased by 10%.What is the difference in Taka between the current price of the toothbrush and the comb ?
Correct Answer:
C: 15
A buzzer sounds every 15 minutes. If the buzzer sounded at 12:40 pm, which of the following could be a time at which the buzzer had sounded before?
Correct Answer:
D: 8:10 AM
Explanation:
A buzzer sounds every 15 minutes. If the buzzer sounded at 12:40 pm, which of the following could be a time at which the buzzer had sounded before? Correct Answer 8:10 AM Parki beach is situated in Gahira, Anwara thana under southern Chittagong region. The beach lies about 28 km. away from Chittagong city. As the beach is situated at the Karnaphuli river channel, visitors can view both the Karnaphuli river and the sea together.
35% of Nabila's income is equal to 25% of Nuru's income. The ratio of their income is
Correct Answer:
A: 5 :7
Explanation:
35% of Nabila's income is equal to 25% of Nuru's income. The ratio of their income is Correct Answer 5 :7 ধরি, নাবিলার মোট উপার্জন = x টাকা এবং, নুরুর মোট উপার্জন = y টাকা প্রশ্নমতে, 35%x = 25%y 35x/100 = 25y/100 x/y = 25/35 x/y = 5/7 x : y = 5 : 7
if x>0 and yx=x, , then what is the value of y in terms of x?
Correct Answer:
A: 1x
x + y = x -y হলে y এর মান নিচের কোনটি?
Correct Answer:
Correct Answer:
Explanation:
x + y = x -y হলে y এর মান নিচের কোনটি? সঠিক উত্তর x+y=x-yx+y-x+y=02y=0y=0/2y=0
A father said to his son , " I was as old as you are at present at the time of your birth". If the father,s age is 36 years now, the son's five years back was____
Correct Answer:
A: 10 years
An accurate clock show 8 O'clock in the morning. Since then , how many degrees will the hour-hand rotate when clock shows 2 O, clock in the afternoon?
Correct Answer:
A: 90 degree
The diameters of two circles are the side of a square and the diagonal of the square. The ratio of the areas of the smaller circle and the larger circle is :
Correct Answer:
A: 1 : 2
Explanation:
The diameters of two circles are the side of a square and the diagonal of the square. The ratio of the areas of the smaller circle and the larger circle is : Correct Answer 1 : 2 Diagonal of a square = √2 × Side The ratio of area of the smaller circle to the larger circle = πr12/πr22 = {π × (a/2)2}/{π × (√2a/2)2} Here, a = Diameter of the smaller circle = 1/2 = 1:2
Ratan and Moinul have started a business investing taka 2.5 million and 3.5 million respectively. After 4 months Ratan gave in 5 lakh taka more while Moinul withdrew 5 lakh taka. If the year ending profit is 12.92 million taka what will be the profit share of Moinul in million taka?
Correct Answer:
D: 8.60
The sum of three consecutive even numbers is 42 and the sum of three consecutive odd numbers is 51. Find the ratio of the lowest even and odd numbers.
Correct Answer:
C: 4:5
Mr.khan invested an amount of TK. 13,900 divided into two different schemes A and B at a simple interest rate of 14% per annum and 11% per annum respectively. If the total amount of simple interest earned in 2 years be Tk. 3,508, what was the amount invested in Scheme B?
Correct Answer:
D: TK. 7500
A and B started a partership business investing some amount in the ratio of 3:5. C joined them after six months with an amount equal to that of B. In what proportion should the profit at the end of the first year be distributed amoung A, B and C?
Correct Answer:
C: 6:10:5
An automobile financier claims to be lending money at simple interest, but he includes the interest every six months for calculating the principal. If he is charging an interest of 10%, the effective rate of interest becomes---
Correct Answer:
A: 10%
There are two numbers , 1 st number is 12 more than the 2nd number . The average of the two numbers is 19. If 2 is added in both numbers , find the ratio of the numbers .
Correct Answer:
D: 9: 5
Explanation:
There are two numbers , 1 st number is 12 more than the 2nd number . The average of the two numbers is 19. If 2 is added in both numbers , find the ratio of the numbers . Correct Answer 9: 5 ATQ, x - y = 12 x + y = 38 ....................... 2x = 50 (Adding the equations) Or, x = 25 So, y = 13 Then, if 2 is added in both numbers , find the ratio of the numbers = x + 2/y + 2 = 27/15 = 9/5
A school has 10 classes with the same number of students in each class. One day, the weather was bad and many students were absent. 5 classes were half full, 3 classes were 3/4 full and 2 classes were 1/8 empty. A total of 70 students were absent. What is the total number of students in this school?
Correct Answer:
A: 200
Explanation:
A school has 10 classes with the same number of students in each class. One day, the weather was bad and many students were absent. 5 classes were half full, 3 classes were 3/4 full and 2 classes were 1/8 empty. A total of 70 students were absent. What is the total number of students in this school? Correct Answer 200 Circumference of the circular path = 2/\50 = 100 /\ m This means 100 /\ m is the distance covered in 60 minutes Therefore distance covered in 15 minutes = 1/4 x 100 /\ m = 25/\ m Now distance covered in one revolution of the wheel = 2 /\(1/2) m = /\ m Therefore number of revolutions in 15 minutes = 25/\ //\ = 25 Read more on Brainly.in - https://brainly.in/question/8996103#readmore
Q is as much younger than R as he is older than T. If the sum of the ages of R and T is 50 years, what is definitely the difference between R and Q's age?
Correct Answer:
A: 2
If x:y=5:3, then (8x-5y): (8x-5y)=?
Correct Answer:
A: 5:11
Explanation:
If x:y=5:3, then (8x-5y): (8x-5y)=? Correct Answer 5:11 Let the desired speed be x km/hr ATQ, 40/20 + 40/x = 80/30 Or, 1/20 + 1/x = 2/30 Or, 1/x = 1/15 - 1/20 Or, 1/x = (4 - 3)/60 Or, x = 60 So, the desired speed is 60 km/hr
If 82x+3=22x+6, then x=?
Correct Answer:
A: -3
Explanation:
If 82x+3=22x+6, then x=? Correct Answer -3 finicky (adjective) (of a person) fussy about their needs or requirements. "a finicky eater" Similar: fussy, fastidious, punctilious, over - particular, hard to please, overcritical, difficult, awkward, exacting, demanding, perfectionist, pass - remarkable, picky, choosy, pernickety, pernickety, nice, showing or requiring great attention to detail. "His finicky copperplate hand".
A tap fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely?
Correct Answer:
A: 3 hours