Quantitative Aptitude - Arithmetic Ability Questions

If (8 - 10x) - (13x - 2) = -9, then the value of x is

The figure shown below consists of the tangents at the extremeties of any chord. Choose the correct option given below.

If √20 + √125 = 15.65, then what is the value of √45 + √5?

Two trains start from a certain place on two parallel tracks in the same direction. The speed of the trains are 45 Km/hr and 40 Km/hr respectively. The distance between the two trains after 45 minutes will be

15 years ago Cynthia was thrice as old as Brittany. The sum of their present ages is 94 years. How old is Brittany now?

What will be the average of all the prime numbers before 19?

From point P, at 6 : 30 pm, a train starts moving towards Q with the speed of 40 km/hr. Another train starts moving from point Q at 7:30 p.m. towards point P at the speed of 60 km/hr. Both of them meet at 11:30 p.m. at point R. What is the ratio of PR and QR?

Mohan earns a profit of 20% on selling a jean at 15% discount on printed price. The ratio of the cost price to printed price of the jean is