Subject Mathematics
401. The average of 100 observations in a study was calculated as 49.7. Later it was revealed that one of the observations was misread as 64 instead of 94. What will be the correct average?
(a) 52.5
(b) 49.8
(c) 55
(d) 50
(e) None of these
Ans. d
402. If x 4 = 5 and x 3 = 8 y , then what is the value of x in terms of y?
(a) 8 5y
(b) 5y 8
(c) 1 8y
(d) 8y
(e) None of these
Ans. b
403. Selim deposited a total of taka 120,000 in two savings accounts for one year. One account offered him 8% interest and the other 10%.If he earned take 10,000 as interest, how much did he deposit at 8%?
(a) Tk. 10,000
(b) Tk. 100,000
(c) Tk. 70,000
(d) Tk. 20,000
(e) None of these
Ans. b
404. If the purchasing price of 15 apples and selling price of 12 apples are the same then how much is the gain in percentage form?
(a) 33.33%
(b) 15%
(c) 20%
(d) 25%
(e) None of these
Ans. d
405. Farhana deposited Tk. 10,000 in a Bank at 13.25% interest rate compounded annually. At the end of the second year, the total amount including interest will become how much?
(a) Tk. 12,826
(b) Tk. 11.844
(c) Tk. 13000
(d) Tk. 14,826
(e) None of these
Ans. a
406. A bookseller can gain 6.666% if the offers a 20% commission on the written selling price of a book .if the commission is reduced to 10%, what will be his gain?
(a) 15%
(b) 10%
(c) 20%
(d) 25%
(e) None of these
Ans. c
407. The ratio between the length and breadth of a field is 7:5.The perimeter of the field is 360 meter. What is the area of the field?
(a) 31000sq. meter
(b) 31500sq.meter
(c) 7875 sq meter
(d) 8775sq meter
(e) None of these
Ans. c
408. Roman covers 17 kilometer in 5 hours. How much time does he need to cover 10.2 kilometer?
(a) 2.5 Hrs.
(b) 3.4 Hrs
(c) 3.5 Hrs
(d) 3 Hrs
(e) None of these
Ans. d
409. Arif incurred a loss of 25 % by selling a used mobile phone set at taka 1500.How much could he gain/ lose by selling that at 2200 taka?
(a) 10% loss
(b) 20% gain
(c) 10% gain
(d) 20 %loss
(e) None of these
Ans. c
410. Rumi and Rony can finish a task, working together, in 12 days if Rony alone can finish that in 20 days, how many days will Rumi need to finish the task working alone?
(a) 30
(b) 20
(c) 25
(d) 33
(e) None of these
Ans. a
411. The average age of 40 employers in a branch of a bank is 35 years. When a new employee joined the bank the average age increased to 35.5 years. What is the age of the new employee?
(a) 55.5
(b) 50
(c) 50.5
(d) 20.5
(e) None of these
Ans. a
In the following table the sales of June 2009 of a particular automobile company is depicted. Answer below two questions based on the data provided in the table below:
412. People use Sedan car and Micro bus for only personal usage. Of all the automobiles sold during that period what percent will be used solely for persona usage?
(a) 70%
(b) 74.22%
(c) 75.52%
(d) 68.94%
(e) None of these
Ans. c
413. What is the difference between the percentage sales of Bus and Truck in Dhaka region?
(a) 1.36%
(b) 2.25%
(c) 0.50%
(d) 1.25%
(e) None of these
Ans. d
414. In a departmental store, notebooks that are normally sold for Tk. 59 each are on sale at 2 for Tk. 99 How much can be saved by purchasing 12 of these notebooks at the sale price?
(a) Tk. 228
(b) Tk. 114
(c) Tk. 195
(d) Tk. 100
(e) None of these
Ans. b
415. If the average of 5 consecutive integers is 13 them what is the sum of the least and the greatest of the 5 integers?
(a) 23
(b) 25
(c) 26
(d) 30
(e) None of these
Ans. c
416. The number 0.01 is how many times as great as the number (0.0001) 2 ?
(a) 10 2
(b) 10 4
(c) 10 6
(d) 10 8
(e) None of these
Ans. c
417. Pallab has exactly 3 times as many Bangladeshi as non �Bangladeshi stamps in his collection. Which of the following cannot be the number of stamps in Pallab�s collection?
(a) 54
(b) 68
(c) 96
(d) 72
(e) All of these can be
Ans. a
418. The cost of manufacturing x water pumps is Tk. 9000+400x. The amount received by selling these x water pumps is Tk. 500x. Water is the least number of water pumps that must be manufactured and sold so that the amount received is at least equal to the manufacturing cost?
(a) 50
(b) 60
(c) 90
(d) 100
(e) None of these
Ans. c
419. If Tk. 6,300 was invested in a share when the price per share was Tk. 9 and additional Tk. 4,200 was invested in the same share when the price per share was Tk. 10, what was the average price per share?
(a) Tk. 9.125
(b) Tk. 9.375
(c) Tk. 9.5
(d) Tk. 9625
(e) None of these
Ans. b
420. In a certain country, a person in born every 5 seconds and a person dies every 13 seconds. Therefore the birth and death rates account for a population growth rate of one person every---.
(a) 0.123 sec
(b) 9 sec
(c) 8 sec
(d) 9.8.125 sec
(e) None of these
Ans. d
421. average of a set of 12 number, which includes 34 is removed from the set and 38 is included to the set, what is the average of the new set of number in terms of A ?
(a) A+4
(b) A+ 1 3
(c) 12A+4
(d) (A + 38) 12
(e) None of these
Ans. b
422. 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?
(a) 4:05 AM
(b) 5:30 AM
(c) 7:15 AM
(d) 8:10 AM
(e) None of these
Ans. d
423. A number consists of two digits. If the digits interchange places and the new number is added balls be drawn from the box, if at lest one black ball is to be included in the draw?
(a) 32
(b) 5
(c) 9
(d) 11
(e) None of these
Ans. d
424. A box contains 2 while balls, 3 black balls and 4 red balls. In how many ways can 3 balls be drawn from the box, if at last one blank ball is to be included in the draw?
(a) 32
(b) 48
(c) 64
(d) 96
(e) None of these
Ans. c
425. A bank offers 5% compound interest calculated on half-yearly basis, A customer deposits Tk. 1600 each on 1st January and 1st July of a year. At the end of the year, how much he would have gained as interest?
(a) Tk. 121
(b) Tk. 123
(c) Tk. 160
(d) Tk. 240
(e) None of those
Ans. a