Quantitative Aptitude - Arithmetic Ability Questions

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

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

A boat is moving away from an observation tower. It makes an angle of depression of 60° with an observer's eye when at a distance of 50m from the tower. After 8 sec., the angle of depression becomes 30°. By assuming that it is running in still water, the approximate speed of the boat is

The difference between simple and compound interest (compounded annually) on a sum of money for 3 years at 10% per annum is Rs. 93. The sum (in Rs.) is:

The HCF of 20, 28 and 48 is

4 + 16 x -12 x 24 - 13 - 3 ÷ 20 - 4 = ?

Compute 4923 / 547 - 10

What is the value of Sec 30° + Tan 60°?