Quantitative Aptitude - Arithmetic Ability Questions

The radius of the circle circumscribing the three vertices of an equilateral triangle is 12 cm. Determine the height (in cm) of the equilateral triangle

$$\begin{gathered} ∆ABC is similar to ∆PQR. If ratio of perimeters of ∆ABC and ∆PQR is 1:2 and \\ if PQ = 10 cm then what is the length of AB (in cm)? \end{gathered}$$

Six year ago Parvez’s age was same as the present age of Manish. If the present age of Parvez is one-fourth more than that of Manish's present age, then in how many years will Parvez’s age become double of Manish’s present age?

What is the value of (4/3) cot2 (p/6) + 3 cos2 (150) – 4 cosec2 45 + 8 sin (p/2)?

The value of x for which the expressions 15x + 4 and 13x - 2 become equal is ______

If the value of √30  is approximately 5.477, then what is the approximate value of 56 ?

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

The ratio between the weights of gold and silver in an alloy is 17:3. If the weight of silver in the alloy is 2.7 gm, find the weight of gold in the alloy?