Quantitative Aptitude - Arithmetic Ability Questions

The least value of tan2x + cot2x is

Vikram and Vivek can finish a work in 50 days. They worked together for 20 days and then left. How much work has been done by them?

An object travels 23 m in 3 s and then another 15 m in 2 s. What is the average speed of the object?

S does half as much work as T in 1/7 of the time taken by T. If together they take 21 days to complete a work, then how may days shall S take to complete that work alone?

Find the greatest number that will divide 390, 495 and 300 without leaving a remainder

If 3n = 2187, then the value of n is:

What is the effective discount on two successive discounts of 20% and 25%?

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