Quantitative Aptitude - Arithmetic Ability Questions

Simplify (b5x2a3z4)*(b3x2a4z5) / (a2b3z2)

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

ABCD is an isosceles trapezium such that AD||BC, AB = 5 cm, AD = 8 cm and BC = 14 cm. What is the area (in cm2) of trapezium?

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?

The average age of 30 boys in a class is 10 years. If the age of their teacher is also included, the average increases by one year. The teacher's age in years is

If  x = 2+3,then what is the value of 2x + 12x ?

Among three numbers , second is twice the first and also thrice the third . If the average of the three numbers is 33 , then the largest number is

The sum of 15 observations of a data is (434 + x). If the mean of the data is x, then the value of x is