Quantitative Aptitude - Arithmetic Ability Questions

In the given figure, if AD = 12 cm, AE = 8 cm and EC = 14 cm, then what is the value of BD in cm?

Find the value of x if 0.08x + 0.04y = 10 and 0.2(x-1) + 0.4y = 24.8

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

cosA/(1 -­ sin A) is equal to

 What is the value of (cosec45 + √3/2) ?

If  a+1/a = 3, then a3+1a3?

A, B and C can finish a job working alone in 72, 24 and 36 days respectively. In how many days they can finish the job if they worked together?

In what ratio is the segment joining points (2, 3) and (-2, 1) divided by the Y-axis?