Quantitative Aptitude - Arithmetic Ability Questions

What is the value of cos 11π/6?

If 3:27 :: 5:?

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

In figure, DE || BC. If DE = 3 cm, BC = 6 cm and area of ΔADE = 15 sq cm, then the area of ΔABC is

The average age of 36 students in a group is 14 years. When the teacher's age is included in it, the average increases by one. The teacher's age in years is

Simple interest on a sum of Rs 50200 for 3 months is Rs 1380.5. What is the rate (in percentage) of interest per annum?

In ΔPQR, ∠QPR = 45° and the bisectors of ∠PQR and ∠PRQ meets at O. What is the value (in degrees) of ∠QOR?

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