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.

What is the least number that can be multiplied to 69120 to make it a perfect cube?

If (x + y)/z = 2, then what is the value of [y/(y – z)] + [x/(x – z)]?

The HCF of 20, 28 and 48 is

Simplify x5 ÷ x43 ÷ x

N invented Rs.20,000 in a business. Six months later, C joined him with Rs. 10,000. At the end of the year, the profit was Rs. 10,000. What should be the share of N?

Which of the following condition is sufficient to state that triangle ABC and DEF are similar?

The external and the internal radii of a hollow right circular cylinder of height 15 cm are 6.75 cm and 5.25 cm respectively. If it is melted to form a solid cylinder of height half of the orignal cylinder, then the radius of the solid cylinder is