The Number Ninja

The smallest prime number is:

• 0

• 2

• 1

• 3

The LCM of 8 and 12 is:

• 48

• 24

• 36

• 96

The HCF of 36 and 60 is:

• 6

• 12

• 18

• 24

If a product is sold at ₹800 with a 20% profit, what was the cost price?

• ₹640

• ₹660

• ₹680

• ₹700

A trader gives a 10% discount on an article marked at ₹500. The selling price is:

• ₹400

• ₹450

• ₹480

• ₹500

If ₹5000 is invested at 5% simple interest per annum for 3 years, the interest earned is:

• ₹500

• ₹750

• ₹1000

• ₹1250

The compound interest on ₹4000 at 10% per annum for 2 years (compounded annually) is:

• ₹800

• ₹840

• ₹880

• ₹900

The HCF of 48, 72, and 96 is:

• 12

• 16

• 24

• 36

A shopkeeper allows a discount of 20% on a marked price and still makes a profit of 25%. If the cost price is ₹500, the marked price is:

• ₹750

• ₹800

• ₹900

• ₹1000

A sum doubles itself in 8 years at simple interest. The rate of interest per annum is:

• 10%

• 12.5%

• 15%

• 20%