Quantitative Aptitude - Arithmetic Ability Questions

If O is the orthocentre of a triangle ABC and ∠BOC = 100°, the measure of ∠BAC is

Value of (4a2+ 12ab + 9b2)/(2a + 3b) is

A wholesaler sells a watch to a retailer at a profit of 33% and the retailer sells it to a customer at a loss of 20%. If the customer pays Rs 2,181.2, what had it cost the wholesaler?

A sum becomes Rs 1392 in 2 years and Rs 1488 in 3 years at simple interest. What is the rate (in percentage) of interest per annum?

The average age of 24 students is 12 years. It was observed that while calculating the average age, the age of a student was taken as 14 years instead of 8 years. What will be the correct average age (in years)?

At what rate of compound interest per annum will a sum of Rs 10000 become Rs 12321 in 2 years?

In a class of 60 students there are 33 girls. The average weight of these girls is 62 Kg and average weight of the full class is 66.5 kg. What is the average weight of the boys of the class?

What is the value of tan4A + tan2A?