Quantitative Aptitude - Arithmetic Ability Questions

Find the unit place digit in 71 x 72 x 73 x 74 x 76 x 77 x 78 x 79.

For an amount, simple interest at the rate of interest of 12% per annum for 6 years is Rs 25920. What will be the compound interest (in Rs) on same amount at the rate of interest of 8% per annum compounding annually for 2 years?

The value of (sec245 - cot245) - (sin230 + sin260) is

A fan is listed at Rs. 150 with a discount of 20% . What additional discount must be offered to the customer to bring the net price to Rs. 108 ?

If 3x + 5y + 7z = 49 and 9x + 8y + 21z = 126, then what is the value of y?

In the following question, select the odd number pair from the given alternatives.

The average salary of male employees in a firm was Rs. 5200 and that of females was Rs. 4200. The mean salary of all the employees was Rs. 5000. What is the % of female employees?

If P = 7 + 4√3 and PQ = 1, then what is the value of 1/P2 + 1/Q2?