Quantitative Aptitude - Arithmetic Ability Questions

What least value which should be added to 1812 to make it divisible by 7, 11 and 14?

In a triangle PQR, ∠Q = 90°. If PQ = 12 cm and QR = 5 cm, then what is the radius (in cm) of the circum circle of the triangle?

tan3A is equal to

A boy buys 5 pencils at Rs 3 each, 3 erasers at Rs 2 each and 3 sharpeners at Rs 5 each. What is the average expenditure (in Rs) per article?

The mean of 10 observations is 13. Two more observations are included and the new mean becomes 14. The mean of two new observations is

The cube of 997 is

An 80 litre mixture of water and acid contains 20% acid. How much acid should be added to make the acid 60% in the new mixture?

A sum of money becomes 77/50 of itself in 18/5 years when invested at simple interest. What is the rate (in percentage) of interest per annum?