Quantitative Aptitude - Arithmetic Ability Questions

If x + [1/(x + 7)] = 0, then what is the value of x – [1/(x + 7)]?

Dodecahedron has 20 vertices. How many edges does it have?

The simple interest on a sum for 5 years is Rs 16800. The rate of interest for the first 3 years is 8% per annum and for the next 2 years is 12% per annum. What is the value (in Rs) of sum?

A car can cover 350 km in 4 hrs. If its speed is decreased by 12.5 kmph. How much time does the car take to cover a distance of 450 kms.

Twenty women can do a work in sixteen days. Sixteen men can complete the same work in fifteen days. The ratio between the capacity of a man and a woman is

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

If x = cosecθ - sinθ and y = secθ - cosθ, then the relation between x and y is

If 2x+ 4(x - 3) < -2 - x < 2x - 1, then find the value of x.