Direction : What value should come in place question mark(?) in the following questions?

4 × 5² – 3² × 7 + 6²=?+24

On a certain sum of money, the simple interest for 2 years is ₹150 at the rate of 10% per annum. What is the difference between the compound interest and the simple interest for 2 years if, in the case of compound interest, interest is compounded annually at the rate of 10% per annum.

The following table shows the number of units of product produced and sold by a company during six years.

What is the percentage of the number of units produced in 2017 more than the number of units produced since 2012?

What is the area ( in cm² ) of the circumcircle of a triangle whose sides are 6 cm , 8 cm and 10 cm respectively ? 

If books bought at prices from ₹150 to ₹ 300 are sold at prices ranging from ₹ 250 to  ₹350, what is the greatest possible profit that might be made in selling 15 books ?

A can do a piece of work in 24 day, B in 32 days and C in 64 days. All begin to do it together, but A leaves after 6 days and B leaves 6 days before the completion of the work. How many days did the work last?

3¹¹ + 3¹² + 3¹³ + 3¹⁴ is divisible by which of the following?

While selling an article, a shopkeeper gives a discount of 5%. If he gives a discount of 7%, he earns Rs.15 less as profit. The marked price of the article is -