Quantitative Aptitude - Arithmetic Ability Questions

If the time increases by 5 years, then simple interest increases by Rs 3000 on a sum of Rs 5000. What is the rate (in percentage) of interest per annum?

The average salary of all workers in a workshop is Rs.12000. The average salary of 7 technicians is Rs.15000 and the average salary of the rest is Rs.9000. The total number of workers in the workshop is

If x2 + ax + b, when divided by x - 3, leaves a remainder of 22 and x2 + bx +a, when divide by x - 3, leaves a remainder of 24, then a + b = ?

A man spends 15% of his income. If his expenditure is Rs. 75, his income (in rupees) is:

What should be the missing digit so that the number 275_476 becomes exactly divisible by 11?

Find the volume (in cm3) of a right circular cylinder of diameter 21 cm and height 10 cm.

What is the value of (√3 - sec60) ?

The number of solutions of the pair of linear equations x + 2y - 8 = 0 and 2x + 4y = 16 is