Quantitative Aptitude - Arithmetic Ability Questions

The length of the diagonal of a square is 14 cm. What is area of this square?

If selling price of 39 articles is equal to the cost price of 42 articles, then what will be the profit percentage?

The incomes of X and Y are in the ratio 5 : 6 and their expenditure are in the ratio 6 : 5. If X saves Rs 7000 and Y saves Rs 15000, then what will be the income (in Rs) of X?

What is the value of (-7776)25

The sum of the digits of a 2-digit number is 11. If we add 45 to the number, the new number obtained is a number formed by interchange of the digits. What is the number?

What is the value of 1+aa1/2+a-1/2-a1/2+a-1/21+a+a-1/2 ?

Calculate the value of 0.77777 + 0.7777 + 0.777 + 0.77 + 0.7 + 0.07.

If compound interest received on a certain amount in the 2nd year is Rs 1200, what will be the compound interest (in Rs) for the 4th year on the same amount at 10% rate of interest?