1. A tap can fill a tank in 6 hours. After half the tanks is filled three more similar taps are opened. Whats is the total time taken to fill the tank completely? (Janata Bank. Assistant Executive Officer: 2019)

4 hrs 15 min

3 hrs 45 min

3 hrs 24 min

4 hrs 51 min

2. The difference Between the length and breadth of a rectangle of a rectangle is 23 m. If its perimeter is 206 m. them its area is : (Janata Bank. Assistant Executive Officer: 2019)

2520 m2

1520 m2

2420 m2

2480 m2

3. The ratio between the perimeter and the breadth of a rectangle is 5:1 If the area of the rectangle is 216 sq. cm, what is the length of the rectangle? (Janata Bank. Assistant Executive Officer: 2019)

16 cm

24 cm

20 cm

18 cm

4. A rectangular block 6 cm by 12 cm is cut up into an exact number of equal cubes. Find the least possible number of cubes. (Janata Bank. Assistant Executive Officer: 2019)

30

40

50

60

5. In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize? (Janata Bank. Assistant Executive Officer: 2019)

5/7

1/5

2/7

1/2

6. Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is heart is: (Janata Bank. Assistant Executive Officer: 2019)

2/20

13/102

29/34

47/100

7. The difference between the compound interest and the simple interest on a certain sum at 5% per annum for 2 years in Tk. 1.50> The sum is --- (Janata Bank. Assistant Executive Officer: 2019)

Tk. 500

Tk. 400

Tk. 300

Tk. 600

8. How many liters of a 90% of concentrated acid needs to be mixed with a 75% solution of concentrated acid to get a 30 liter Solution of 78% concentred acid? (Janata Bank. Assistant Executive Officer: 2019)

8

6

7

9

9. If 1/5:1/N = 1/N : 1/1.25, then the value of N is---- (Janata Bank. Assistant Executive Officer: 2019)

1.25

1.5

2.25

2.5

10. A shopkeeper marks the price of an article at Tk. 80. What will be the selling price, if he allows two successive discounts of 5

Tk. 72

Tk. 85

Tk. 72.2

Tk. 7.2