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

There are a total of 200 students in a school, of which 7/10th are boys. Find the number of girls in the school.

The HCF of 24, 60 and 90 is:

Find the fraction which bears the same ratio to 1/27 that 3/7 does to 5/9 .

Find the value of p if ­-3x -­ 11, x + p and 5x + 7 are in arithmetic progression.

If a-1a=1, then a2 + 1a2 ?

If (7x -­ 13) ­ (12x + 3) = 14, then the value of x is ______ .

The income of P, Q and R are in the ratio of 5 : 4 : 3 respectively and their expenses are in the ratio of 6 : 5 : 4 respectively. If P saves Rs 4000 out of an income of Rs 10000, then what will be the saving (in Rs) of Q?