Quantitative Aptitude - Arithmetic Ability Questions

(1 + sec 20° + cot 70°)(1 - cosec 20° + tan70°) is equal to

The sum of three numbers is 162. If the ratio of the first number to the second number is 5 : 7 and that of the second number to the third number is 5 :3, then what is the second number?

The lengths of the diagonals of a rhombus are 8 cm and 6 cm. The area of rhombus is:

Simple interest on a sum for eight months at 6% per annum is Rs 340.What is the value (in Rs) of sum?

A can do a certain job in 12 days. B is 60% more efficient than A. Then B can do the same piece of work in

Working alone A can do the task in 27 hours and B can do it in 54 hours. Find C's share (in Rs) if A, B and C get paid Rs 4,320 for completing a task in 12 hours on which they worked together.

If P=9, Q=17 then the value of p2-q2-13

cot2A + cos2A is equal to