List of top Quantitative Aptitude Questions on Data Sufficiency

What is the area of a square? Statement I: The perimeter of the square is 20 cm. Statement II: The diagonal of the square is \(\sqrt{50}\) cm.
By what percentage did the sales of a shop increase? Statement I: Sales rose from Rs. 200 to Rs. 250. Statement II: The increase in sales was Rs. 50.
Is the positive integer \(n\) divisible by 6? Statement I: \(n\) is divisible by 3. Statement II: \(n\) is divisible by 4.
What is the two-digit number? Statement I: The sum of its digits is 9. Statement II: The number is divisible by 9 and its tens digit is 4.

A man distributed 43 chocolates to his children. How many of his children are more than five years old?

Statements:
I. A child older than five years gets 5 chocolates. 
II. A child 5 years or younger in age gets 6 chocolates. 

If $R$ is an integer between $1$ and $9$, $P - R = 2370$, what is the value of $R$?

\(\textbf{Statements:}\)
I. $P$ is divisible by $4$. 
II. $P$ is divisible by $9$. 

Under the same 'Airtel One' plan, ISD calls to different groups of countries are billed at different per minute rates. A person makes a total of 12 minutes of ISD calls in a month. If 80% of his ISD bill amount came from calls made to the 'Rest of the World' group, then the ISD calls of the minimum duration were made to which of the following groups of countries?
In March 2007, Computers Ltd. made a bundled offer of its laptops together with Deskjet printers to boost sales, though both products were also sold individually. What is the price of the printer, if bought separately? Decide whether the information given in the two statements below is enough to answer the question.

Statement (1): The bundled offer price was Rs 42,600.
Statement (2): The laptop, without the bundle offer, was priced at Rs 39,400.
The profits of Biscuits India Ltd rose by 32% in the year 2006-07 compared to the year 2005-06. By what percentage did Biscuits India's Sales increase in 2006-07 compared to the previous year? (Assume: Profit = Sales - Expenses.) Decide whether the information given in the two statements below is enough to answer the question.

Statement (1): Expenses in 2006-07 were Rs 1,400 crores, compared to Rs 1,220 crores in 2005-06.
Statement (2): Sales in 2006-07 were Rs 4,300 crores.
Bags I, II, and III contain at least one ball each and together have 10 balls. How many balls are in each bag? Decide whether the statements are sufficient.
(1) Bag I contains five balls more than Bag III.
(2) Bag II contains half as many balls as Bag I.