Quantitative Aptitude - Arithmetic Ability Questions

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

If the amount received at the end of 2nd and 3rd year at Compound Interest on a certain Principal is Rs 16854, and Rs 17865.24 respectively, what is the rate of interest?

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

If 2sec2x - tan2x = 5 and 0° ≤ x ≤ 90°, then x = ?

If Sinx = 4/5, then Secx/Sinx = ?

Ritesh sold a pen for Rs. 36 with a profit of 20%. If it were sold for Rs.33, then what could be the percentage of profit or loss?

The ratio of angles of a triangle are 1 : 2/3 : 3. Then the smallest angle is

If ABCD is a Cyclic Quadrilateral, then the value of Cos2A - Cos2B - Cos2C + Cos2D is