Quantitative Aptitude - Arithmetic Ability Questions

The 4th and 7th term of an arithmetic progression are 11 and -4 respectively. What is the 15th term?

If the angles of a triangle are in the ratio of 2 : 5 : 8, then find the value of the largest angle.

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

The total surface area of a hemisphere is 41.58 sq cm, find its radius.

Two trains are moving in the same direction at the speed of 24 km/hr and 50 km/hr. The time taken by faster train to cross a man sitting in the slower train is 72 seconds. What will be the length (in metres) of the faster train?

If the cost price of 20 books is the same as selling price of 25 books, then the loss percentage is

The simple interest on a sum for 5 years is two­fifth of the sum. The rate of interest per annum is

In an isosceles triangle ABC, AB = AC and ∠A = 80°. The bisector of ∠B and ∠C meet at D. The ∠BDC is equal to