Quantitative Aptitude - Arithmetic Ability Questions

A sum of Rs 4000 becomes Rs 7000 in 6 years at simple interest. If the rate of interest becomes double of itself, then what will be the amount (in Rs) after 6 years?

ABCD is a quadrilateral with AB = 9 cm, BC = 40 cm, CD = 28 cm, DA = 15 cm and angle ABC is a right –angel
What is the area of quadrilateral ABCD?

The mean of 12 observations is 15. One more observation is included and the new mean becomes 16. The 13th observation is

The sum of present age of father and his son is 60 yrs. Six years ago, father's age was five times the age of the son. After 6 years, son's age will be?

A shopkeeper increases the price of an object by 40% and then sells it at 25% discount on the marked price. If the selling price of such an object be Rs. 2100, its cost price for the shopkeeper was ?

Which one of the following is the minimum value of the sum of two integers whose product is 24?

The smallest number, which should be added to 756896 so as to obtain a multiple of 11, is