Quantitative Aptitude - Arithmetic Ability Questions

wooden bowl is in shape of a hollow hemisphere of internal radius 9 cm and thickness 1 cm. Find the total surface area of the bowl?

The sum of a non-zero number and ten times its reciprocal is 7. Find the number.

Simple interest on a certain sum of money for 3 years at 8% per annum is half the compound interest on Rs. 16000 for 2 years at 10% per annum. The sum placed on simple interest is:

The line passing through (-2,5) and (6,b) is perpendicular to the line 20x + 5y = 3. Find b?

In the following question, select the odd letters from the given alternatives.

What is the Compound interest on Rs. 5000 in 3 years, if the rate of interest is 4% for the first year, 3% for the second year and 2% for the third year?

Speed of a boat along and against the current are 14 kms/hr and 8 kms/hr respectively. The speed of the current is

ΔDEF is similar to ΔGHI. Length of DE is 9 cm and length of the corresponding side GH is 16 cm. What is the ratio of areas of Δ DEF : Δ GHI?