Quantitative Aptitude - Arithmetic Ability Questions

If a – (1/a) = b, b – (1/b) = c and c – (1/c) = a, then what is the value of (1/ab) + (1/bc) + (1/ca)?

If the measure of the interior angle of a regular polygon is 1800, then how many sides does it have?

x, y and z are prime numbers and x + y + z = 38. What is the maximum value of x?

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?

When a number is increased by 32, it becomes 116% of itself. What is the number?

Akash is 3 times as good a workman as Baldev and therefore is able to finish a job in 40 days less than Baldev. Working together, they can finish it in _____.

Manish can complete a work in 21 days and Karan can complete the same work in 28 days. If both together work for 7 days, then what fraction of total work is left?

A shopkeeper marks his goods 50% more than the cost price and allows a discount of 25%. His profit or loss percentage is: