Quantitative Aptitude - Arithmetic Ability Questions

What is the value of sin 75°+ sin 15°?

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

The cash difference between the selling price of an article at a profit of 4% and 6% is Rs. 3. The ratio of two selling prices is:

In an army selection process, the ratio of selected to unselected was 6:1. If 90 less had applied and 30 less selected, the ratio of selected to unselected would have been 8:1. How many candidates had applied for the process?

The points A(x,2), B(­2,1) and C(6,­3) are collinear. Find x?

In ΔDEF measure of angle E is 90°. If cosD = 8/17, and DE = 16cm, then what is the length (in cm) of side DF?

If a+bab=21 ,  then the value of (a-b) is

What is the simplified value of sec4θ – sec2θ tan2θ?