The number 2918245 is divisible by which of the following numbers?

Find the single equivalent discount for successive discounts of 12%, 18% and 25% on the marked price of a car. 

The angle of elevation of the top of a building at a distance of 70 m from its foot on a horizontal plane is found to be 60°. Find the height of the building.

The average of 20 numbers is 32. If two numbers are 29 and 31, then what is the average of the remaining numbers (correct up to two decimals)? 

Find the standard deviation of the following data (rounded off to two decimal places). 

5, 3, 4, 7 

Select the INCORRECT formula from the following options.

The LCM of x² − 8x + 15 and x² − 5x + 6 is: 

What is the ratio of the simple interest earned on a certain amount at the rate of 21% per annum for 8 years to that earned on the same sum at the same rate for 21 years?