Question : Out of a total of 9 books arranged in a particular order, the mean of the number of pages in the first 5 books is 430, the mean of the number of pages in the last 5 books is 380 and the mean of the number of pages in all the 9 books is 400. Find the number of pages in the fifth book.

Option 1: 450

Option 2: 420

Option 3: 430

Option 4: 440

Question : Find the value of $(9^2+4^3 \div 8) \times 5$.

Option 1: 445

Option 2: 420

Option 3: 450

Option 4: 400

Question : The cost of a notebook increases in proportion to the number of pages in it. A notebook having 100 pages costs INR 20. Find the cost of a notebook having 400 pages.

Option 1: INR 60

Option 2: INR 50

Option 3: INR 80

Option 4: INR 40

Question : $\frac{2}{7}$ of $40$% of B = 48. What is the value of B?

Option 1: 400

Option 2: 380

Option 3: 360

Option 4: 420

Question : The difference between 73% of a number and 45% of the same number is 112. Find the number.

Option 1: 450

Option 2: 400

Option 3: 500

Option 4: 550

Question : If 50 percent of a number is 80, then what will be the 250 percent of that number?

Option 1: 400

Option 2: 360

Option 3: 440

Option 4: 480