Quantitative Aptitude - Arithmetic Ability Questions

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

When a discount of 25% is given on a box of popcorn, the profit is 25%. If the discount is 10%, then the profit is

Three years ago, the average age of a family of 5 members was 17 years. A baby having been born, the average age of the family is the same today. The present age of the baby is

The reciprocal of the sum of the reciprocals of 2/9 and 7/10 is

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

A ship is full of cargo containers. It drops 2/3 of cargo containers at the first port and takes 60 more, at the second port it drops two third of the new total and takes eleven more. On arriving at the third port it is found that it have 48 cargo containers. Find the number of cargo containers in the ship at the starting?

If 2 shirts are offered free on purchase of 3 shirts priced Rs 600 each, then what will be the effective discount on each shirt?

In ΔABC, the angle bisector of ∠A cuts BC at E. Find the length of AC if lengths of AB, BE and EC are 9.6 cm, 4 cm and 3 cm?