Test Preparation on CAT Model Test Quantitative Ability Paper -1

The total cost of 2 pencils, 5 erasers and 7 sharpeners is Rs.30,
while 3 pencils and 5 sharpeners cost Rs.15 more than 6 erasers. By what amount (in Rs.) does the cost of 39 erasers and 1 sharpener exceed the cost of 6 pencils?

If the roots of the equation (x + 1) (x + 9) + 8 = 0 are a and b, then the roots of the equation (x + a) (x + b) - 8 = 0 are

What is the remainder when 7700 is divided by 100?