Quantitative Aptitude - Arithmetic Ability Questions

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

The mean of a distribution is 21 and the standard deviation is 7. What is the value of the coefficient variation?

Find the odd word/letters/number from the given alternatives.

Compute 33800/520/5

If Tan A = 15/8 and Tan B = 7/24, then Cos(A - B) = ?

The income of P, Q and R are in the ratio of 5 : 4 : 3 respectively and their expenses are in the ratio of 6 : 5 : 4 respectively. If P saves Rs 4000 out of an income of Rs 10000, then what will be the saving (in Rs) of Q?

Length and breadth of a rectangle are increased by 40% and 70% respectively. What will be the percentage increase in the area of rectangle?

If Sec θ = 13/12, then Cot θ = ?