Quantitative Aptitude - Arithmetic Ability Questions

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?

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

P and Q can do a project in 20 and 12 days respectively. In how many days can they complete 40% of the project if they work together?

The percentage change of a number when it is first decreased by 10% and then increased by 10% is

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.

If the amount received at the end of 2nd and 3rd year at compound Interest on a certain Principal is Rs 9,600 and Rs 10,272 respectively, what is the rate of interest (in %)?

If α + β = 90° and α:β = 2:1, then the ratio of cosα to cosβ is