Quantitative Aptitude - Arithmetic Ability Questions

Two numbers are 10% and 20% lesser than a third number respectively. By how much percent is the second number should be enhanced to make it equal to the first number?

The distance between the points (4, 8) and (k,-4) is 13. What is the value of k?

A 220 metres long train takes 33 seconds to cross a 440 metres long bridge. How much time (in seconds) will the train take to cross a 350 metres long bridge?

If the average age of four children is 12 years and the average age of these children and their fathers is 20 years, what is the age of the father?

K is 5 years older to H. H is 3 years younger to R. R is 6 years older to C. C is 7 years younger to L. Who is the eldest?

In a Δ ABC, DE || BC. D and E lie on AB and AC respectively. If AB = 7 cm and BD = 3cm, then find BC:DE

If (7x -­ 13) ­ (12x + 3) = 14, then the value of x is ______ .

The sum of a non-zero number and its reciprocal is 2. What is the number?