Quantitative Aptitude - Arithmetic Ability Questions

The lengths of the diagonals of a rhombus are 8 cm and 6 cm. The area of rhombus is:

In the following question, select the odd word from the given alternatives.

P and Q are two alloys which are prepared by mixing tin and lead in the ratio of 12 : 5 and 4 : 3 respectively. If equal quantities of alloys are melted to form athird alloy R, then what is the ratio of tin and lead in alloy R?

If √(1 - sin2A) = x, then the value of x is

A solid cylinder has radius of base 14 cm and height 15 cm. 4 identical cylinders are cut from each base as shown in the given figure. Heoght of small cylinder is 5 cm. What is the total surface area of the remaining part?

If 5x = 30-y = 6z, then what is the value of (xy + yz + zx)/xyz?

What is the measure of an interior angle of a regular decagon?

If 2x-y2+(3y-2z)2=0,then the ratio of x:y:z is