Quantitative Aptitude - Arithmetic Ability Questions

If the shopkeeper sells an item at Rs 1600 which is marked as Rs 2000, then what is the discount he is offering?

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

When a number is increased by 34, it becomes 117% of itself. What is the number?

If ( x - 5)2 + (y - 2)2 + (z - 9)2 = 0, then value of (x + y - z) is

If 3a+4b3c+4d = 3a-4b3c-4d, then 

In the following question, select the odd letters from the given alternatives.

If the value of √42 is approximately 6.480, then what is the approximate value of √(6/7)?

The length of one side of a rhombus is 13 cm and one of the diagonals is 10 cm. What is the legth of the other diagonal?