Quantitative Aptitude - Arithmetic Ability Questions

The ratio of incomes of C and D is 3 : 2. Ratio of income of D and E is 5 : 4. If one-third of C’s income is Rs 4000 more than the half of E’s income, then what is the D’s income (in Rs)?

In the following question, select the odd letter pair from the given alternatives.

What is the highest common factor of 360 and 450?

The 3rd and 9th term of an arithmetic progression are -8 and 10 respectively. What is the 16th term?

What is the value of 2sec2A?

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

If 15 persons can do a job in 30 days, then 30 persons with twice the efficiency can do the same job in how many days?

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: