C8ii Math Quiz

The compound interest on ₹ 30000 at 7% per annum for a certain time is ₹ 4347. The time is

• 2 years

• 3 years

• 4 years

• 5 years

How much percent above the cost price should a shopkeeper mark his goods so that after allowing a discount of 25% on the marked price, he gains 20% ?

• 30%

• 40%

• 50%

• 60%

A dealer purchased a washing machine for ₹ 7660. He allows a discount of 12% on its marked price and still gains 10%. The marked price of the machine is

• ₹ 9575

• ₹ 9755

• ₹ 5975

• ₹ 7955

If 7/3 % of a number is 42, then the number is

• 9800

• 1800

• 980

• 180

The population of a place increased to 54,000 in 2003 at a rate of 5% per annum. find the population in 2001

• 48700

• 46500

• 45000

• 48980

The percentage of 2 : 5

• 20%

• 50%

• 60%

• 40%

Ron scored 344 marks out of 400 marks and his elder brother Ben scored 582 marks out of 600 marks. Who scored percentage is better?

• Ron

• Ben

• both are equal

• None of these above

 $The\ correct\ formula\ to\ find\ compound\ interest\ is$  

•  $CI\ =\ P\left(1+\frac{R}{100}\right)^T-P$  

•  $CI=\ P\left(1-\frac{R}{100}\right)^T-P$  

•  $CI=\ P\left(1+\frac{R}{100}\right)^T+P$  

• None of these

find the ratio of 40 paise to ₹ 4

• 1 : 10

• 10 : 1

• 100 : 1

• 1 : 100

The C.I. on ₹ 2000 at 10% rate of interest p.a. for 2 year is

• ₹ 400

• ₹ 410

• ₹ 430

• ₹ 420