Quantitative Aptitude - Arithmetic Ability Questions

Select the odd word/letters/number/number pair from the given alternatives.

sec2Acosec2A is equal to

If sec (4x - 50°) = cosec(50° - x), Then the value of x is

If 5x + 6(3-2x) = 4, then what is the value of x?

Find k, if the line 4x - y = 1 is perpendicular to the line 5x - ky = 2?

The prices of chairs and tables are in the ratio of 9 : 5. If the chairs cost Rs. 4200 more than the tables, find the price of the tables? (in Rs.)

Convert binary 1101111 to decimal.

A can do a work in 16 days and B in 20 days. If they work on it together for 8 days, then what fraction of work is left?