M can do a work in 25 days which N alone can do in 20 days. M started the work and was joined by N after 10 days . Find the number of days taken in completing the work ?

17(2/3) days

11(2/3) days

16(2/3) days

26(2/3) days

36(2/3) days

RAJ is a cloth merchant.He uses 120cm scale while buying,instead a meter scale ,but uses an 80 cm scale while selling the same cloth. If he offers a discount of 20% on cash payment. Find the profit percent.

44

22

40

20

60

AMAL is working in a firm and earn to support his family , he spends 40% of his salary and saves the remaining for the future purpose . After some years his salary is increased by 30% and he increased his expenditure by 25%. By what % does his saving increase?

**33.33%**

**13.33%**

**53.33%**

**3.33%**

**333.33%**

Biman is thrice as efficient as Biki. Biman started the work and worked for 6 days then he is replaced by Biki , he worked for 9 more days and they together finish 50% of the work. Find in how many days Biki completed the work?

34 days

14 days

44 days

54 days

4 days

RAM marked his PENS at such a price that after allowing a discount of 12(1/2) % for cash payment, he makes a profit of 20% . What is the marked price of the PENS which costs Rs. 210 ?

144

234

288

1333

2000

In DELHI PUBLIC School, 20% of students are below 10 years of age. The number of students above 10 years of age is 2/3 of the number of students of 10 years of age which is 54. What is the total number of students in the school?

**212.5**

**312.5**

**112**

**412.5**

**112.5**

If a shopkeeper SITESH sells a RADIO at 15% profit and a DVD at 12% loss then he earns Rs. 540 as total profit but if he sells the RADIO at 12% loss and the DVD at 15% profit then there is no loss or profit. Find the price of the RADIO and the DVD?

6000

8000

4000

2000

1000

An ore of COPPER,10% of the ore gets wasted,out of the total production of COPPER From the remaining copper, only 15% is pure copper, if the pure copper obtained in a year from a mine of copper was 2700 kg. Find the quantity of copper mined in the year .

**20,000**

**10,000**

4000

5000

2000

**The measure of the angles of a triangle are in the ratio 2 : 7 : 11. Measures of angles are**

16°, 56°, 88°

18°, 63°, 99°

18°, 63°, 140°

28°, 63°, 99°

18°, 73°, 99°

**The value of cos 1° cos 2° cos3° … cos 180° is**

0

1

-1

2

1/2