G S Rehill's Interactive Maths Software Series - "Building a Strong Foundation in Mathematics" available from mathssoftware.co.nz

Order Maths Software for $25

 

Year 9 Interactive Maths - Second Edition


Problem Solving Unit

Problem 12.1  Percentage Increase

The sides of this cube are x units long.

1.  If each side of the cube is increased by 1%,
     what is the side-length of the new cube?

2.  Find the volume of the:
a.  original cube
b.  new cube

3.  Find the increase in volume.

4.  By what percent has the volume of the cube
     increased?  Express your answer to the nearest
     one-hundredth of a percent.

 

Problem 12.2  An Estate

A $33,000 estate is divided between 5 children and a great uncle.  The children receive equal shares and the great uncle receives a one-half share.  How much money does each child receive?


Problem 12.3  Number of Votes

The winning candidate for a local council mayor position received 5% more votes than her opponent.  If there were 82,000 votes cast, by how many votes did she win?


Problem 12.4  A Clothing Store

A clothing store stocked 350 trousers.  During January it sold 30% of the trousers.  In February it sold 40% of the remaining trousers.  How many trousers were left at the end of February?


Problem 12.5  To Earn Enough

Jodie is paid $90 for a 6 hour workday.  How many minutes must she work to earn enough to purchase a $10 book?


Problem 12.6  Two Players

Two players hired a car for $189 a week.  One player used the car for 2 days and the other player used it for 5 days.  How much should each player pay?


Problem 12.7  Salesman

Sally's dad is a salesman.  He receives a salary of $210 a week plus 1.4% of his sales.  If his total sales for a week were $3500, how much money did he earn for that week?

 

Study Another Topic in Chapter 12: Consumer Arithmetic

Percentages ] Changing a Percentage to a Decimal ] Changing a Decimal or a Fraction to a Percentage ] Finding a Percentage of a Quantity ] Expressing a Quantity as a Percentage of another Quantity ] Percentage Decrease ] Percentage Increase ] Loss ] Profit ] Simple Interest ] Calculating the Principal ] Calculating the Rate of Interest ] Calculating the Time ] Loans ] Discount ] Commission ] Problem Solving ] [ Problem Solving Unit ] Projects ] Symbols ] Index ]

 

Study Another Chapter
 

| Home Page | Order Maths Software | About the Series | Maths Software Tutorials

| Year 7 Maths Software | Year 8 Maths Software | Year 9 Maths Software |

| Year 10 Maths Software | Homework Software | Tutor Software | Maths Software Platform |
| Trial Maths Software | Feedback | Year 7 Maths Reading | Year 8 Maths Reading |

| Year 9 Maths Reading | Year 10 Maths Reading | About mathsteacher.com |

| Our Policies | Terms and Conditions | Links | Contact |

 

The following international Websites are available for faster software downloads:
www.mathsteacher.com.au for Australia, www.mathsoftware.biz for the USA,
www.mathematicssoftware.co.uk for the UK, www.mathssoftware.co.za for South Africa
and www.mathsoftware.in for India.

 

Copyright © 2000-2011 mathsteacher.com Pty Ltd.  All rights reserved.

Australian Business Number 53 056 217 611

 

Copyright instructions for educational institutions

 

Please read the Terms and Conditions of Use of this Website and our Privacy and Other Policies.

If you experience difficulties when using this Website, tell us through the feedback form or by
phoning one of our contact telephone numbers.