Quantitative Aptitude - Arithmetic Ability Questions

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

Find the value of  x3 - y3, if x - y = 4 and xy = 12.

What is the simplified value of 12-13 ?

What is the value of Sin 30- √2 Cos 30

If Sinθ = √3/2 and 0°<θ<90°, then the value of tan(θ-15°) is

The smallest number that must be subtracted from 2800 so that the obtained number is a perfect square is

35% of an alloy was silver. If in the quantity of alloy there was 119 g of silver, what was the quantity of the elements in the alloy?

A sphere has the same curved surface area as a cone of vertical height 40 cm and radius 30 cm. The radius of the sphere is