Subject Mathematics
601. A father is three times as old as his son. After fifteen years the will be twice as old as his son's age at that time. Hence the father's present age is -
(a) 36
(b) 42
(c) 45
(d) 48
(e) None of these
Ans. c
602. If x = -1, then - ( x 4 + x 3 + x 2 + x) =
(a) -10
(b) -4
(c) 0
(d) 4
(e) 10
Ans. c
603. A rectangle is 14 cm long and 10 cm wide. If the length is reduce by x cms and its width is increased also by x cms so as to make it a square, then its area changes by:
(a) 4
(b) 144
(c) 12
(d) 2
(e) None of these
Ans. a
604. There 'e' students in a school studying English and 'a' student studying Arabic. How many students study English and Arabic or both, of 'b' students study both?
(a) e + a
(b) ea + b
(c) e + a - b
(d) e( a - b )
(e) e + a - 2b
Ans. c
605. What is 4 1 6 % as a fraction?
(a) 1 6
(b) 1 48
(c) 1 18
(d) 2 3
(e) 1 24
Ans. e
606. In still water a boy rows 5 miles an hour. With the aid of current he can make a 21 miles trip in 3 hours. How fast is the current?
(a) 2 miles
(b) 4 miles
(c) 6 miles
(d) 3 miles
(e) 5 miles
Ans. a
607. If x + 1 > 1 - 2x then
(a) x > 0
(b) x < 0
(c) x > 3
(d) x < -3
(e) x = -2
Ans. a
608. The parameter of a square is 56, the length of each side is
(a) 10
(b) 12
(c) 14
(d) 8
(e) not determinable
Ans. c
609. The average of 2, 7, 6 and x is 5 is 10. The value of y is
(a) 30
(b) 20
(c) 10
(d) 5
(e) 15
Ans. b
610. How many number between 1 and 100 are there of the form 7x + 5 where x is a positive integer?
(a) 147
(b) 11
(c) 17
(d) 9
(e) 13
Ans. e
611. a : b = 2 : 3 and a + b = 4. What is the value of (a + b) : (b - a)?
(a) 3 : 2
(b) 4 : 7
(c) 5 : 1
(d) 2 : 5
(e) 7 : 9
Ans. c
612. If the lengths of the three sides of a triangle are consecutive integers, then the smallest possible value of the sum of the lengths of the three sides is
(a) 9
(b) 7
(c) 6
(d) 12
(e) 15
Ans. e
613. Quantity A : 1 - 1 27 and Quantity B : 8 9 + 1 81
(a) Quantity in A is greater
(b) Quantity in B is greater
(c) The two quantity are equal
(d) The relationship indeterminate
(e) None of these
Ans. a
614. Which of the following equations is not equivalent to 25 x 2 = y 2 - 4?
(a) 25 x 2 + 4 = y 2
(b) 75 x 2 = 3 y 2 - 12
(c) 25 x 2 = (y + 2)(y - 2)
(d) 5x = y - 2
(e) None of them
Ans. d
615. A zookerper counted the heads of the animals in a zoo and found it ti be 80. When he counted the legs of the animals he found it to be 260. If the zoo had either pigeons or horses, how many horses were in the zoo?
(a) 40
(b) 30
(c) 50
(d) 60
(e) None of these
Ans. c
616. When a student weighing 45 kgs left a class, the average weight of the remaining 59 students increased by 200g. What is the average weight of the remaining 59 students
(a) 57 kgs
(b) 56.8 kgs
(c) 58.2 kgs
(d) 52.2 kgs
(e) None of these
Ans. a
617. The average temperature on Wednesday, Thursday and Friday was 25°C. The average temperature on Thursday, Friday and Saturday was 24°C. If the temperature on Saturday was 27°C, what the temperature on Wednesday?
(a) 24°C
(b) 21°C
(c) 27°C
(d) 30°C
(e) None of these
Ans. d
618. If 18 is 15 percent of 30 percent of a certain number, what is the number?
(a) 9
(b) 36
(c) 40
(d) 81
(e) 400
Ans. e
619. The average daily earning of a man who makes TK 25 each of the first 9 days, Tk 30 each of the nest 10 days and Tk 40 each of the last 11 days is TK
(a) 31.67
(b) 32.17
(c) 32.67
(d) 31.17
(e) 32
Ans. b
620. A ship leaves port and sails 6 miles west. It then sails 6 miles south and then 6 miles west again. Approximately how many miles the ship from port?
(a) 9
(b) 11
(c) 13
(d) 15
(e) 17
Ans. c
621. How many squares will there be, if a rectangle of area 60 is cut square of side 1 2
(a) 30
(b) 60
(c) 120
(d) 180
(e) 240
Ans. e
622. If each side of a square is doubled, the perimeter of the square is
(a) double
(b) multiplied by 3
(c) multiplied by 4
(d) halved
(e) unchanged
Ans. a
623. A worker can do a job in 4 hours and another worker can do it in 2 hours. How many such works can they do together in 4 hours?
(a) 1
(b) 3
(c) 5
(d) 6
(e) 8
Ans. b
624. If two sides of a triangle are 5 and 6, then third side can not be
(a) 2
(b) 3
(c) 7
(d) 10
(e) 12
Ans. e
625. What percent of 200 is 0.001% of 2 2 × 5 3
(a) 0.0025
(b) 0.025
(c) 0.0145
(d) 0.0005
(e) 0.2500
Ans. a