Quantitative Aptitude - Arithmetic Ability Questions

The average age of A and B is 18 years. After 3 years, C joins them and the average ages of A, B and C becomes 22 years. The age of C is ?

Of the 5 numbers whose average is 78, the first is 2/11 times the sum of other 4. The first number is

Of the 5 subjects, the average marks of Rakesh in first 3 Subjects was 79 and the average marks in the last 3 subjects was 86. If his marks in the third subject was 80, then what was his average marks in all the 5 subjects?

If the curved surface area of a right circular cone is 3080 sq cm and its slant height is 35 cm, find its total surface area?

If 2x + 2(4 + 3x) < 2 + 3x > 2x + x/2; then x can take which of the following values?

If 2x + 6y = 3xy and 10x -­ 3y = 4xy, find x, y.

60% of P = 50% of Q and Q = x% of P. What is the value of x?

A loan of Rs. 305 was taken at a certain rate per annum of compound interest, for 3 years. After 3 years the amount repaid was Rs. 670, calculate the rate of compound interest.