Quantitative Aptitude - Arithmetic Ability Questions

The height and the slant height of a right circular cone are 24 cm and 25 cm, respectively. Considering π as 22/7 , find the curved surface area of the said cone.

A dealer marks his goods 20% above cost price. He then allows some discount on it and makes a profit of 8%. The rate of discount is

If a + b = 10 and ab = 21, then the value of (a - b)2 is

If a+b-62+a2b2+1+2b=2ab+2a, then the value of a is 

The sum of ages of 4 children born at intervals of 4 years each is 60. What is the age of the youngest child?

A train left 1 hour later than the scheduled time but in order to reach its destination 200 km away in time, it had to increase its usual speed by 10 km/hr. What is the usual speed (in km/hr) of the train?

Average of 14 numbers is 32. If the average of last 5 numbers is 26, then what is the average of the remaining numbers?

Point P (-2, 5) is the midpoint of segment AB. Co-ordinates of A are (-5, y) and B are (x, 3). What is the value of x?