Quantitative Aptitude - Arithmetic Ability Questions

Coefficient of x2 in (x + 7)(5 - 3x)(3x - 6) is

Find the mean proportional between 2 and 98?

Ticket for an adult is Rs 1200 and a child is Rs 800 respectively. One child goes free with two adults. If a group has 25 adults and 5 children what is the discount the group gets?

Two students appeared for an examination. One of them secured 26 marks more than the other and his marks were 75% of the sum of their marks. The marks obtained by them are

The sum of three consecutive even numbers is 42. Find the middle number.

The simple interest on a sum for 5 years is Rs 16800. The rate of interest for the first 3 years is 8% per annum and for the next 2 years is 12% per annum. What is the value (in Rs) of sum?

If a4 + 1 = [a2 /b2 ] (4b2 – b4 – 1), then what is the value of a4 + b4?

If the perimeter of a semi-circle is 36 cm, then find its radius (in cm).