Quantitative Aptitude - Arithmetic Ability Questions

A, B and C together can complete a work in 25 days. If the ratio of efficiency of A, B and C is 15 : 10 : 6 respectively, then in how many days C alone can complete the same work?

If cosec4A -­ cosec2A = x, then value of x is?

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

After deducting 60% from a certain number and then deducting 15% from the remainder, 1428 is left. What was the initial number?

50% of a = b, then b% of 40 is the same as _________ of a.

On dividing 24a2b2 by 6b2, we will get

If (x + y + z) = 12, xy + yz + zx = 44 and xyz = 48, then what is the value of x3 + y3+ z3?

A, B and C can do a job working alone in 12, 16 and 24 days respectively. In how many days they can do the job if they worked together?