Quantitative Aptitude - Arithmetic Ability Questions

In the following question, four number pairs are given. The number on left side of (–) is related to the number of the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives .

When a discount of 25% is given on a box of popcorn, the profit is 25%. If the discount is 10%, then the profit is

The cube of 997 is

If cosA + cos2A = 1 then the value of sin2A + sin4A is

If the length of one side and the diagonal of a rectangle are 8 cm and 17 cm respectively, then find its perimeter

If after giving a discount of 18%, a book is sold for Rs 1599, then what will be the marked price (in Rs) of the book?

What is the value of √121 + √12321 + √1234321 + √123454321?

If the age of Rahul is 5 years more than his friend Ajay's age and the age of Rahul's wife is 6 years less than Rahul, and Ajay's wife is 1 year older than Rahul's wife, then which of the following statements is true?