Quantitative Aptitude - Arithmetic Ability Questions

A tyre is sold at three successive discounts of 20%,30%, and 20%. What is the net discount (in percentage)

The cost of leveling a triangular piece of land whose sides are 72 m. 30 m and 78 in respectively at the rate of 20 paisa per square metre is:

If Tan θ = 9/40, then Sec θ = ?

When a number is increased by 38, it becomes 119% of itself. What is the number?

A shopkeeper, sold cocoa seeds at the rate Rs 1,230 a kg and bears a loss of 5%. Now if he decides to sell it at Rs 1,353 per kg, what will be the result?

Two trains move from stations M and N. Both trains move towards each other at speeds of 54 km/hr and 63 km/hr respectively. When they meeteach other, the second train has travel 100 km more than the first. What is the distance (in km) between M and N

Expand and simplify (2x + 5)2 *(4x ­- 1) -­ (3x3 - 16x2 + 25x -­ 21)

If x3 – y3 = 81 and x – y = 3, then what is the value of x2 + y2?