Quantitative Aptitude - Arithmetic Ability Questions

The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?

D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD:DB = 2:3 and area of ΔADE is 4 sq cm, what is the area (in sq cm) of quadrilateral BDEC.

Two circles are having radii 9 cm and 12 cm. The distance between their centres is 15 cm. What is the length (in cm) of their common chord?

Between 200 and 400 how many numbers are divisible by 7?

The diagonal of a cube is 192 cm. Its volume in cm3 will be 

A missile travels at 1440 km/h. How many metres does it travel in one second?

The ratio between the speeds of two buses is 11:9. If the second bus runs 270 kms in 15 hours, then the speed of the first bus is?

The average of 21 numbers is 12. The average of the first 11 numbers is 9 and the average of the last 11 numbers is 15. What is the value of the middle number?