Quantitative Aptitude - Arithmetic Ability Questions

If Sinx = 4/5, then Secx/Sinx = ?

A boat goes 15 km upstream and 10 1/2 km down stream in 3 hrs 15 min. It goes 12 km upstream and 14 km downstream in 3 hrs. What is the speed of the boat in still water?

In a mixture 25 liters, the ratio of milk and water is 4:1. How many liters of milk must be added to make the ratio 16:1?

n an alloy, lead and tin are in the ratio of 2 : 3. In the second alloy, the ratio of same elements is 3 : 4. If equal quantities of these two alloy are mixed to forma new alloy, then what will be the ratio of these two elements in the new alloy? 

An angle is 60 deg more than one fifth of its complement. Find the smaller angle in degrees.

32% of a number is 80. What is the number?

ΔABC is similar to ΔDEF. If the ratio of similar sides is K:1, the ratio of their areas is

The length and breadth of a rectangle are 15 cm and 8 cm respectively. Find its area (in cm2)