Quantitative Aptitude - Arithmetic Ability Questions

What is the ratio of simple interest earned on certain amount at the rate of 12% for 6 years and that for 12 years?

Working together P, Q and R reap a field in 6 days. If P can do it alone in 10 days and Q in 24 days, in how many days will R alone be able to reap the field?

The total surface area of a hemisphere is 462 sq cm, what is its curved surface area? (Take π = 22/7)

A cricketer, whose bowling average was 12.4 runs/wicket takes 5 wickets for 22 runs in a match, thereby decreases his average by 0.4. The number of wickets, taken by him before this match was:

Find the value of  x3 - y3, if x - y = 4 and xy = 12.

Find the degree of the polynomial 8x4 + 2x2y3 + 4

Select the odd word/letters/number/number pair from the given alternatives.

Weight of A and B are in the ratio 11 : 8. A’s weight increases by 40% and the total weight of A and B increases by 30%. What is the percentage increase in the B’s weight?