Quantitative Aptitude - Arithmetic Ability Questions

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

What is that least number that must be added to the product 684 × 686 to make it a perfect square?

Solve 675.9995+(3.9989)2 = ? ÷ 16.9900865

Of the 3 numbers whose average is 70, the first is 1/9 times the sum of other 2. The first number is

Two labourers A and B are paid a total of Rs 650 per day. If A is paid 160 percent of what is paid to B, how much (in Rs) is B paid?

The price of an article is cut by 9%, to restore to its original value, the new price must be increased by

Two whole numbers are such that the cube of first number exceeds the cube of second by 61 and the ratio of the numbers is 5:4. What is the value of larger number?

The diagonals of two squares are in the ratio 5:2.The ratio of their area is