Quantitative Aptitude - Arithmetic Ability Questions

Average of two numbers is 8 and average of other three numbers is 3 ; the average of the five numbers is

Select the related number from the given alternatives.
0.02 : 0.002 :: 1/3 : ?

The price of an article is decreased by 10%. To restore it to its former value, the new price must be increased by

If P = 7 + 4√3 and PQ = 1, then what is the value of (1/P2) + (1/Q2)?

In a trapezium, one diagonal divides the other in the ratio 2 : 9. If the length of the larger of the two parallel sides is 45 cm, then what is the length (in cm) of the other parallel side?

In the given figure, in a right angle triangle ABC, AB = 12 cm and AC = 15 cm. A square is inscribed in the triangle. One of the vertices of square coincides with the vertex of triangle. What is the maximum possible area (in cm.sq) of the square?

5 bottles cost as much as 2 bags. The cost of 15 bottles and 4 bags is Rs 2,000. What is the price (in Rs.) of a single bag?

If x = 1/(√2+1) then the value of x2 + 2x - 1 is