Quantitative Aptitude - Arithmetic Ability Questions

What is the average of all natural numbers from 21 to 39?

A train crosses a 375 m long platform in 27 seconds. How long was the train if it was travelling at the speed of 70 kmph?

If the amount received at the end of 2nd and 3rd year at Compound Interest on a certain Principal is Rs 1,800, and Rs 1,926 respectively, what is the rate of interest?

Two successive discounts of 10% and 20% are equivalent to a single discount of

AB and AC are the two tangents to a circle whose radius is 6 cm. If ∠BAC = 60 deg, then what is the value (in cm) of √(AB2 + AC2)?

If the selling price is Rs 728 after getting a discount of 9%, what was the marked price?

Find the greatest number that will divide 390, 495 and 300 without leaving a remainder

If sinθ+cosecθ=2, the value of sinnθ+cosecnθ is