Quantitative Aptitude - Arithmetic Ability Questions

If 40 is 0.05% of x, then what is the value of x?

In the following question, select the odd letter/letters from the given alternatives.

The length of one side of a rhombus is 13 cm and one of the diagonals is 10 cm. What is the legth of the other diagonal?

ABCD is a quadrilateral with AB = 9 cm, BC = 40 cm, CD = 28 cm, DA = 15 cm and angle ABC is a right –angel. 
What is the area of triangle ADC?

The total surface area of a hemisphere is 462 sq cm, what is its curved surface area? (Take π = 22/7)

A work can be completed by 18 boys in 24 days. If 6 boys leave after working for 12 days, then how many days will be needed to complete the remaining work?

Breadth of a rectangle is equal to the diagonal of the square whose side is 2.5√2 cm. Ratio between length and breadth of rectangle is 3 : 1. Find the area of the rectangle (in cm2).

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