Quantitative Aptitude - Arithmetic Ability Questions

Determine the value of a+1b-1 when ab = 343.

If P : Q = 9 : 7, then what is the value of (P – Q) : (P + Q)?

The variance of a set of data is 121. Then the standard deviation of the data is

Which of the following numbers is not composite?

A factory buys 8 machines. 3 Machine­A, 4 Machine­B and rest Machine­C. Prices of the machines are Rs 45000, Rs 25000 and Rs 35000 respectively. Calculate the average cost (in Rs) of these machines?

In ΔPQR, PQ = PR = 18 cm, AB and AC are parallel to lines PR and PQ respectively. If A is the mid-point of QR, then what is the perimeter (in cm) of quadrilateral ABPC?

The diameter of a circle is equal to the side of the square. What is the area of the square if the area of the circle is 49π sq cm?

The radius and height of a solid cylinder are increased by 2% each. What will be the approximate percentage increase in volume?