Quantitative Aptitude - Arithmetic Ability Questions

If 2(5x - ­4) -­ 2 < 2x ­- 1 < 4x - ­2; then the value of x is

If tanθ = 815, then 1-sinθ1+sinθ is

Koushik can do a piece of work in X days and Krishnu can do the same work in Y days. If they work together, then they can do the work in

In an alloy, aluminium and tin are in the ratio of 4 : 5. In the second alloy, the ratio of same elements is 4 : 7. If equal quantities of these two alloys be mixed to form a new alloy, then what will be the ratio of both of these elements in the new alloy?

If a sum of money doubles itself in 8 yrs, then the interest rate in percentage is ?

R borrowed Rs. 1,200 at 13% per annum simple interest. What amount will R pay to clear the debt after 5 years?

If (-1/2) * ( x - 5) + 3 = -5/2, then what is the value of x?

If the angles of a triangle are in the ratio of 1 : 4 : 7, then find the ratio of the greatest angle to the smallest angle.