Quantitative Aptitude - Arithmetic Ability Questions

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

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?

If 3x + 4y – 2z + 9 = 17, 7x + 2y + 11z + 8 = 23 and 5x + 9y + 6z – 4 = 18, then what is the value of x + y + z – 34?

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?

∆XYZ is right angled at Y. If tanX = 24/7, then what is the value of cotZ ?

What is the value of (-7776)25

There are 90 coins, comprising of 5 and 10 paisa coins. The value of all the coins is Rs. 7. How many 5 paisa coins are there?

Three categories of employees get wages in the ratio of 1 : 2 : 3. If they get increments of 5%, 10% and 15% respectively, what will be the new ratio of their wages?