The marked price of a watch is 800. A shopkeeper gives two successive discounts and sells the watch at 612. If the first discount is 10%, the second discount is: 

On a certain Principal if the Simple interest for two years is Rs 4800 and Compound interest for the two years is Rs 5088, what is the rate of Interest?

A metallic solid spherical ball of radius 3 cm is melted and recast into three spherical balls. The radii of two of these balls are 2 cm and 1.5 cm. What is the surface area (in cm²) of the third ball?

The LCM of four consecutive numbers is 60 The sum of the first two numbers is equal to the fourth number. What is the sum of four numbers? 

If m = – 4, n = – 2, then the value of m³ – 3m² + 3m + 3n + 3n² + n³ is

In the given question, two equations numbered l and II are given. Solve both the equations and mark the appropriate answer.

I. x²+ 19x + 78 = 0

II. 45y²+ 83y + 28 = 0

What should come in place of the question mark '?' in the following number series?

8.5, 9.5, 21, 66, ?, 1345

Given is a line graph showing the number of accidents in a city during the first 6 months of 1999.

The decrease % of accidents from May to June is