Math Set - 7

1. The length of the square, the area of which is equal to the area of a rectangle of sides 49.28 and 27.72 meters is

a. 36.16 m.  b. 36.56 m.
c. 36.76 m.  d. 36.96 m.

2. The value of square root of 341.1409 is

a. 18.43  b. 18.47
c. 18.63  d. 18.67

3. The sum of money that will amount to Rs.2400 at the rate of 8% simple interest per year in 2.5 years is

a. Rs.1500  b. Rs.1800
c. Rs.2000  d. Rs.2100

4. For an increase of income tax of 3 paisa per rupee the income of a man is reduced by Rs.150. His total income is

a. Rs.4800  b. Rs.4900
c. Rs.5000  d. Rs.5200

5. When a company decreased the price of its scooters by 30%, the sales of scooters increased by 30%. The net effect on total sale is

a. 6% decreased
b. 3% increased
c. 6% increased
d. 9% decreased

6. A bag contains 8 red , 5 white balls, 2 balls are drawn at random. What is the probability that both are white?

a. 2/16  b. 2/89
c. 2/110 d. 5/39

7. The breadth of a rectangular field is 75% of its length. If the perimeter of the field is 1,050 meters, the area of the field is

a. 65,000 sq.m.
b. 62,000 sq.m.
c. 67,000 sq.m.
d. 68,500 sq.m.

8. A sum of money is to be divided among A, B and C in the ratio of 3:7:6. If the difference in the shares of A and B is Rs.2,700. What is the share of C?

a. Rs.4050  b. Rs.4000
c. Rs.4100  d. Rs.4500

9. Dinesh and Ram can independently complete a piece of work in 80 and 120 minutes respectively. If they work together, how much time will they take to complete the work?

a. 24 minutes b. 100 minutes
c. 48 minutes d. 200 minutes

10. were employed to finish a job in 20 days but the men drop off by 5 at every 10th day. In what time the work will be complete?

a. 27 years  b. 23.33 days
c. 28 days  d. 26 days

11. If x men can do a piece of work in 8 says and x+4 men can do the same work in 6 days then x is equal to

a. 10  b. 6
c. 12  d. 24

12. By selling 12 oranges for a rupee, a man lose 20%. How many for a rupee should he sale to gain 20%.

a. 15  b. 10
c. 8  d. 5

13. If 3 men and 5 women can do a piece of work in 8 days and 2 men and 7 children can do the same piece of work in 12 days, how many women can do as much work in a day as 21 children?

a. 10  b. 15
c. 12  d. 7

14. If the area of the adjacent faces of a rectangular block are in the ratio of 2:3:4 and its volume is 900 cm.cb. Then the length of the shortest side is

a. 30 cm.  b. 20 cm.
c. 15 cm.  d. 10 cm.

15. If 5 men and 3 children can reap 23 acres of field in 4 days and 3 men and 2 children can reap 7 acres in 2 days, how many children must assist 7 men in order that they may reap 45 acres in 6 days?

a. 2   b. 3
c. 4   d. 5

16. If each edge of a cube is increased by 50%, the percentage increased in the surface area is

a. 50%  b. 75%
c. 100%  d. 125%

17. The length of canvas1.1 m. wide required to build a conical tent of height 14m. and the floor area of 346.5 sq.m. is

a. 65 m.  b. 525 m.
c.  490 m.  d. 860 m.

18. A man takes 5 hours 45 minutes in walking to certain place and riding back on a scooter. He would have gained 2 hour by riding on a scooter both ways. The time he would take to walk both ways is

a. 7 hrs.45 mins
b. 8 hrs. 25 mins.
c. 8 hrs.30 mins.
d. 6 hrs.30 mins.

19. If 20 men complete one third of a work in 20 days, how many more men should be employed to finish the rest of the work in 25 days?

a. 10  b. 12
c. 15  d. 20

20. A bag contains 5 blue and 4 black balls. Three balls are drawn at random. What is the probability that 2 are blue and 1 is black?

a. 10/21 b. 2/5
c. 1/6  d. 1/8

Answers: 1(d), 2(b), 3(c), 4(c), 5(d), 6(d), 7(c), 8(a), 9(c), 10(b)
11(c), 12(c), 13(a), 14(c), 15(a), 16(d), 17(b), 18(a), 19(b), 20(c).