Quantitative Aptitude - Arithmetic Ability Questions

An angle is thrice its complementary angle. What is the measure of the angle?

A boat cover row 12 km upstream in 4 hours and can cover the same distance downstream in 3 hours. What is the speed (in km/hr) of the boat in still water?

If Sin θ = 20/29 , then what is the value of Sec Sin θ ?

The rate of simple interest for which a sum of money becomes 5 times in 8 years is

D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD:DB = 2:5 and area of ΔABC is 98 cm sq, what is the area (in sq cm) of quadrilateral BDEC?

The base of a triangle is half the base of a parallelogram having the same area as that of the triangle. The ratio of the corresponding heights of the triangle to the parallelogram will be

If x - 2y = 2 and 3x + y = 20, then the value of (x,y) is

What is the value of S = 11x3x5 + 11x4 + 13x5x7 + 14x7 + 15x7x9 + 17x10 + ... upto 20 terms. Then what is the value of S?