Quantitative Aptitude - Arithmetic Ability Questions

The effective annual rate of interest corresponding to a nominal rate of 15% per annum payable half-yearly is

Convert the 0.0068 in to vulgar fraction:

Vinay professes to lose 4% on sugar and uses a weight of 620 gm instead of 1 kg. What is the total profit percentage?

The ratio of present ages of Ratna and Shantanu is 5:4. After 19 years the ratio of their ages will be 10:9. What is Ratna's present age?

The length of the diagonal of a square is 10 cm. What is area of this square?

If a + b = 10 and ab = 21, then the value of (a - b)2 is

If α and β are roots of the equation 3x2 – 13x + 14 = 0, then what is the value of (α/β) + (β/α)?

If u : v = v : w, then what is the value of u4 : v4?