Quantitative Aptitude - Arithmetic Ability Questions

ΔDEF is similar to ΔGHI. Length of DE is 9 cm and length of the corresponding side GH is 16 cm. What is the ratio of areas of Δ DEF : Δ GHI?

What is the measure (in degree) of an exterior angle of a regular polygon of 9 sides?

If √(1 - cos2A) = x, then the value of x is

The value of 16 - [5 - 2{14 of 2 - (8 ÷ 4 x 2 - 1 + 3}] is

The curved surface area and the diameter of a right circular cylinder are 660 sq.cm and 21 cm respectively. Find its height (in cm).

What is the value of √2 Sec 45 - Tan 30?

A car travels from A to B with 40 Km/h and returns from B to A with 60 Km/h. Its average speed during the whole journey is

A can do a work in 36 days and B in 12 days. If they work on it together, then in how many days will they be able to do the work?