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GCSE Maths Coursework  - Maxi Product

 

Introduction

 

In this investigation, I am going investigate the Maxi Product of numbers. I am going to find the Maxi Product for selected numbers and then work out a general rule after individual rules are worked out for each step. I am going to find the Maxi Product for double numbers, I will find two numbers which added together equal the number selected and when multiplied will equal the highest number possible that can be retrieved from two numbers multiplied together. I am also going to find the Maxi Product for triple numbers, I will find three numbers which added together equal the number selected and when multiplied will equal the highest number possible that can be retrieved from three number multiplied together. And finally, I am going to find the Maxi Product for quadruplet numbers, I will find four numbers which added together equal the number selected and when multiplied will equal the highest number possible that can be retrieved from four numbers multiplied together. After working out the individual rules for these three sectors of numbers, I will then work out the general rule for any amount of numbers it can be split into. For example, it can be split up into five numbers and I will be able to find the Maxi Product of any number given by splitting it up into five numbers. I will be using whole numbers, decimal numbers and fractional numbers.

 

Double Numbers

 

Examples: 12

 

(5,7)= 12  5+7  5x7=35

(6,6)= 12  6+6  6x6=36

(4,8)= 12  4+8  4x8=32

 

I have found that 36 is the highest number so far that can be retrieved from 6 and 6 when the number is 12, in whole numbers. I will now try in decimal numbers if I can get a number higher than 36.

 

(6.5,5.5)=12  6.5+5.5  6.5x5.5=35.75

(6.7,5.3)=12  6.7+5.3  6.7x5.3=35.51

(6.3,5.7)=12  6.3+5.7  6.3x5.7=35.91

(6.2,5.8)=12  6.2+5.8  6.2x5.8=35.96

(6.1,5.9)=12  6.1+5.9  6.1x5.9=65.99

 

I still have not yet found a number higher than 36 in decimal numbers. I will try now in fractional numbers if I can get a number higher than 36.

 

(6 1/3,5 2/3)=12  6 1/3+5 2/3  6 1/3x5 2/3=35.88

(6 2/5,6 3/5)=12  6 2/5+6 3/5  6 2/5x6 3/5=35.84

(6 2/7,5 5/7)=12  6 2/7+5 5/7  6 2/7x5 5/7=35.92 (2dp)

(6 2/9,5 7/9)=12  6 2/9+5 7/9  6 2/9x5 7/9=35.95 (2dp)

 

I have found that 6 and 6 are the two numbers which added together make 12 and when multiplied together make 36 which is the highest possible answer which is retrieved when two numbers added together equal 12 are multiplied.

 

13

 

(1,12)=13  1+12  1x12=12

(2,11)=13  2+11  2x11=22

(3,10)=13  3+10  3x10=30 from coursewrok work info

(4,9)=  13   4+9    4x9 =36

(5,8)=  13   5+8    5x8 =40

(6,7)=  13   6+7    6x7 =42

 

I have found that 42 is the highest number so far that can be retrieved from 6 and 7 when the number is 13, in whole numbers. I will now try in decimal numbers if I can get a number higher than 42.

 

(6.1,6.9)=13  6.1+6.9  6.1x6.9=42.09

(6.3,6.7)=13  6.3+6.7  6.3x6.7=42.21

(6.5,6.5)=13  6.5+6.5  6.5x6.5=42.25

(6.6,6.4)=13  6.6+6.4  6.6x6.4=42.24

 

I have found a number higher than 42 in decimal numbers. I will try now in fractional numbers if I can get a number higher than 42.24.

 

(6 1/3, 6 2/3)=      13  6 1/3+6 2/3        6 1/3x6/2/3      =42.22 (2dp)

(6 1/15, 6 14/15)=13  6 1/15+6 14/15  6 1/15x6 14/15=42.06 (2dp)

(6 2/13, 6 11/13)=13  6 2/13+6 11/13  6 2/13x6 11/13=42.13 (2dp)

 

I have found that 6.5 and 6.5 are the two numbers which added together make 13 and when multiplied together make 42.25 which is the highest possible answer which is retrieved when two numbers added together equal 13 are multiplied.

 

14

 

(1,13)=14  1+13  1x13=13

(2,12)=14  2+12  2x12=24

(3,11)=14  3+11  3x11=33

(4,10)=14  4+10  4x11=44

(5,9)=  14  5+9    5x9  =45

(6,8)=  14  6+8    6x8  =48

(7,7)=  14  7+7    7x7  =49

 

I have found that 49 is the highest number so far that can be retrieved from 7 and 7 when the number is 14, in whole numbers. I will now try in decimal numbers if I can get a number higher than 49.

(7.1,6.9)=      14  7.1+6.9      7.1x6.9    =48.99

(7.2,6.8)=      14  7.2+6.8      7.2x6.8    =48.96

(7.01, 6.99)= 14  7.01+6.99  7.01x6.99=48.9999

 

I still have not yet found a number higher than 49 in decimal numbers. I will try now in fractional numbers if I can get a number higher than 49.

 

(7 1/10, 6 9/10)=   14  7 1/10+6 9/10    7 1/10x6 9/10  =48.99

(7 4/15, 6 11/15)= 14  7 4/15+6 11/15  7 4/15x6 11/15=48.929 (3dp)

(7 1/15, 6 14/15)= 14  7 1/15+6 14/15  7 1/15x6 14/15=48.996 (3dp)

 

I have found that 7 and 7 are the two numbers which added together make 14 and when multiplied together make 49 which is the highest possible answer which is retrieved when two numbers added together equal 14 are multiplied.

 

15

 

(1,14)= 15  1+14  1x14=14

(2,13)= 15  2+13  2x13=26

(3,12)= 15  3+12  3x12=36

(4,11)= 15  4+11  4x11=44

(5,10)= 15  5+10  5x10=50

(6,9)=   15  6+9    6x9  =54

(7,8)=   15  7+8    7x8  =56

 

I have found that 56 is the highest number so far that can be retrieved from 7 and 8 when the number is 15, in whole numbers. I will now try in decimal numbers if I can get a number higher than 56.

 

(7.1,7.9)= 15  7.1+7.9  7.1x7.9=56.09

(7.2,7.8)= 15  7.2+7.8  7.2x7.8=56.16 sufi, please do not redistribute this project. We work very hard to create this website, and we trust our visitors to respect it for the good of other students. Please, do not circulate this project elsewhere on the internet. Anybody found doing so will be permanently banned."

(7.3,7.7)= 15  7.3+7.7  7.3x7.7=56.21

(7.4,7.6)= 15  7.4+7.6  7.4x7.6=56.24

(7.5,7.5)= 15  7.5+7.5  7.5x7.5= 56.25

 

I have found a number higher than 56 in decimal numbers. I will try now in fractional numbers if I can get a number higher than 56.25.

 

(7 2/9, 7 7/9)= 15  7 2/9+7 7/9  7 2/9x7 7/9= 56.173 (3dp)

(7 5/9, 7 4/9)= 15  7 5/9+7 4/9  7 5/9x7 4/9= 56.247 (3dp)

 

I have found that 7.5 and 7.5 are the two numbers which added together make 15 and when multiplied together make 56.25 which is the highest possible answer which is retrieved when two numbers added together equal 15 are multiplyed.

 

 

16

 

(1,15)= 16  1+15  1x15=15

(2,14)= 16  2+14  2x14=28

(3,13)= 16  3+13  3x13=39

(4,12)= 16  4+12  4x12=48

(5,11)= 16  5+11  5x11=55

(6,10)= 16  6+10  6x11=60

(7,9)=   16  7+9    7x9  =63

(8,8)=   16  8+8    8x8  =64

 

I have found that 64 is the highest number so far that can be retrieved from 8 and 8 when the number is 16, in whole numbers. I will now try in decimal numbers if I can get a number higher than 64.

 

(8.1,7.9)=     16  8.1+7.9      8.1x7.9    =63.99

(8.2,7.8)=     16  8.2+7.8      8.2x7.8    =63.93 (2dp)

(8.01,7.99)= 16  8.01+7.99  8.01x7.99=63.999

 

I still have not yet found a number higher than 64 in decimal numbers. I will try now in fractional numbers if I can get a number higher than 64.

 

(8 1/10,7 9/10)=    16  8 1/10+7 9/10    8 1/10x7 9/10  =63.99

(8 4/15,7 11/15)=  16  8 4/15+7 11/15  8 4/15x7 11/15=63.93 (2dp)

(8 1/15, 7 14/15)= 16  8 1/15+7 14/15  8 1/15x7 14/15=63.996 (3dp)

 

I have found that 8 and 8 are the two numbers which added together make 16 and when multiplied together make 64 which is the highest possible answer which is retrieved when two numbers added together equal 16 are multiplied.

 

Results of Numbers

 

 

 

 

 

Join now!

 

 

 

 

 

 

 

Table of results for double numbers: 

 

 

What I notice:

 

I notice that the Maxi product is retrieved when the two halves of the selected number are multiplied together. I also notice that the two halves are always the same.

 

For example, 12; twelve will have a Maxi Product of 36 as the half of twelve is six and six multiplied by itself will give you 36 which is the Maxi Product of 12.

Testing my Theory

The maximum product that can be retrieved by the number 8 is ...

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