GMAT Quant Chapter 7: Unit Conversions

Question 1

Which form must we always express really large or really small numbers in?

Use the random variables x, y, and n to demonstrate this form.

Answer 1

Scientific notation

x.y 10^n

Question 2

Certain units require us not only to convert the measurement metric but also the value involved in the conversion, what type of units require this form of conversion?

Answer 2

Units with exponents, e.g. if we are asked to express feet in metres squared we must square the feet value too.

Question 3

What statement of sameness do we use to convert two different units into the same measure?

Answer 3

Statement of equality
e.g. 1 Quart = 2 pints

Question 4

How should we approach a question where we have to convert 2 different units in a calculation?

Answer 4

Convert 1 unit at a time.

Remember that the second conversion will likely include some calculation of two numbers as we’ve already performed one conversion.