# IDENTIFYING SETS FOR REAL WORLD SITUATIONS

## About "Identifying sets for real world situations"

Identifying sets for real world situations :

Real numbers can be used to represent real-world quantities. Highways have posted speed limit signs that are represented by natural numbers such as 55 mph. Integers appear on thermometers. Rational numbers are used in many daily activities, including cooking.

For example, ingredients in a recipe are often given in fractional amounts such as 2/3 cup flour.

## Identifying sets for real world situations - Examples

Example 1 :

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The number of people wearing glasses in a room"

The set of whole numbers best describes the situation. The number of people wearing glasses may be 0 or a counting number.

Example 2 :

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The circumference of a flying disk has a diameter of 8, 9, 10, 11, or 14 inches"

The set of irrational numbers best describes the situation. Each circumference would be a product of π and the diameter, and any multiple of π is irrational.

Example 3 :

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The amount of water in a glass as it evaporates"

Real numbers ; the amount can be any number greater than 0.

Example 4 :

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The number of seconds remaining when a song is playing, displayed as a negative number"

Possible answer : Real numbers ; the number of seconds left can be any number less than 0, depending on the display device.

Example 5 :

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The change in the value of an account when given to the nearest dollar"

Integers ; the change can be a whole dollar amount and can be positive, negative, or zero.

Example 6 :

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The markings on a standard ruler"

Rational numbers ; the ruler is marked every 1/16 th inch.

After having gone through the stuff given above, we hope that the students would have understood "How to identify sets for real world situations".

Apart from the stuff given in this section, if you need any other stuff in math, please use our google custom search here.

WORD PROBLEMS

HCF and LCM  word problems

Word problems on simple equations

Word problems on linear equations

Algebra word problems

Word problems on trains

Area and perimeter word problems

Word problems on direct variation and inverse variation

Word problems on unit price

Word problems on unit rate

Word problems on comparing rates

Converting customary units word problems

Converting metric units word problems

Word problems on simple interest

Word problems on compound interest

Word problems on types of angles

Complementary and supplementary angles word problems

Double facts word problems

Trigonometry word problems

Percentage word problems

Profit and loss word problems

Markup and markdown word problems

Decimal word problems

Word problems on fractions

Word problems on mixed fractrions

One step equation word problems

Linear inequalities word problems

Ratio and proportion word problems

Time and work word problems

Word problems on sets and venn diagrams

Word problems on ages

Pythagorean theorem word problems

Percent of a number word problems

Word problems on constant speed

Word problems on average speed

Word problems on sum of the angles of a triangle is 180 degree

OTHER TOPICS

Profit and loss shortcuts

Percentage shortcuts

Times table shortcuts

Time, speed and distance shortcuts

Ratio and proportion shortcuts

Domain and range of rational functions

Domain and range of rational functions with holes

Graphing rational functions

Graphing rational functions with holes

Converting repeating decimals in to fractions

Decimal representation of rational numbers

Finding square root using long division

L.C.M method to solve time and work problems

Translating the word problems in to algebraic expressions

Remainder when 2 power 256 is divided by 17

Remainder when 17 power 23 is divided by 16

Sum of all three digit numbers divisible by 6

Sum of all three digit numbers divisible by 7

Sum of all three digit numbers divisible by 8

Sum of all three digit numbers formed using 1, 3, 4

Sum of all three four digit numbers formed with non zero digits

Sum of all three four digit numbers formed using 0, 1, 2, 3

Sum of all three four digit numbers formed using 1, 2, 5, 6