Quantitative Aptitude - Arithmetic Ability Questions

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 = ?

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

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

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

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

The arithmetic mean of the marks scored by students of a class is 58. 20% of them secured a mean score of 60. The mean score of another 30% of the students was 40. The mean score of the remaining students is