DAY 239 at 7puzzleblog.com

Today’s Challenge

Three UNIQUE digits from 1-9 must be used to arrive at a specified target number, 19.

The formula is simple – multiply two numbers together, then either add or subtract the third number to achieve your goal, but the three numbers used each time must all be different.

So, you must try to arrive at the answer of 19 by using the formula (a × b) ± c where a, b and c are three unique digits from 1-9.

One way to make 19 is (7 × 2) + 5, can you find the other THIRTEEN ways?

[Note:  (7 × 2) + 5 = 19 and  (2 × 7) + 5 = 19 counts as just ONE way]

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Answers

. . . can be found when clicking this.

7puzzleblog

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Welcome

the7puzzlecompanyA warm welcome to 7puzzleblog.com, the World’s Top Daily Number Puzzle Website – and home to the 7puzzle company.

We do many mathematical things at the 7puzzle company, one of which is to design and produce daily number puzzles for our many followers from over 160 different countries and territories around the world.

Our aim is to help improve people’s basic knowledge and confidence of number and arithmetic in a fun way, so start your numerical adventure by having a go at solving our latest number puzzle shown above – and improve your number & logic skills too!

Our bumper compendium of challenges at 7puzzleblog.com contains a different number puzzle every day.

There is the added bonus of having an additional three number puzzles daily from January 1 (DAY 1) to March 25 (DAY 85); 255 extra challenges which are perfect for revision purposes.  These are related to our signature board game, the 7puzzle game, and a superb resource for teachers and parents to utilise with the children!

Click on the dates below to access our number puzzles and we will reply to all comments and answers received as well as tweets to @7puzzle and e-mails to paul@7puzzle.com.

Spread the message about our fabulous daily number puzzles at 7puzzleblog.com to family, friends, students and colleagues.  Answers are provided and can be found here!

To find out more about the 7puzzle company, simply click this link.

Paul Godding       Owner, the 7puzzle company

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January/Ionawr/Enero/Janeiro/Janvier/Eanáir/Gennaio

1        2        3        4        5        6        7        8

9       10       11       12       13       14       15       16

17       18       19       20       21       22       23       24

25       26       27       28       29       30       31

February/Chwefror/Febrero/Fevereiro/Février/Feabhra/Febbraio

1        2        3        4        5        6        7        8

9       10       11       12       13       14       15       16

17       18       19       20       21       22       23       24

25       26       27       28       29

March/Mawrth/Marzo/Março/Mars/Márta/Marzo

1        2        3        4        5        6        7        8

9       10       11       12       13       14       15       16

17       18       19       20       21       22       23       24

25       26       27       28       29       30       31

April/Ebrill/Abril/Abril/Avril/Aibreán/Aprile

1        2        3        4        5        6        7        8

9       10       11       12       13       14       15       16

17       18       19       20       21       22       23       24

25       26       27       28       29       30

May/Mai/Mayo/Maio/Mai/Bealtaine/Maggio

1        2        3        4        5        6        7        8

9       10       11       12       13       14       15       16

17       18       19       20       21       22       23       24

25       26       27       28       29       30       31

June/Mehefin/Junio/Junho/Juin/Meitheamh/Guigno

1        2        3        4        5        6        7        8

9       10       11       12       13       14       15       16

17       18       19       20       21       22       23       24

25       26       27       28       29       30

July/Gorffennaf/Julio/Julho/Juillet/Iúil/Luglio

1        2        3        4        5        6        7        8

9       10       11       12       13       14       15       16

17       18       19       20       21       22       23       24

25       26       27       28       29       30       31

August/Awst/Agosto/Agosto/Août/Lúnasa/Agosto

1        2        3        4        5        6        7        8

9       10       11       12       13       14       15       16

17       18       19       20       21       22       23       24

25       26       27       28       29       30       31

September/Medi/Septiembre/Setembro/Septembre/MeánFómhair/Settembre

1        2        3        4        5        6        7        8

9       10       11       12       13       14       15       16

17       18       19       20       21       22       23       24

25       26       27       28       29       30

October/Hydref/Octubre/Outubro/Octobre/DeireadhFómhair/Ottobre

1        2        3        4        5        6        7        8

9       10       11       12       13       14       15       16

17       18       19       20       21       22       23       24

25       26       27       28       29       30       31

November/Tachwedd/Noviembre/Novembro/Novembre/Samhain/Novembre

1        2        3        4        5        6        7        8

9       10       11       12       13       14       15       16

17       18       19       20       21       22       23       24

25       26       27       28       29       30

December/Rhagfyr/Diciembre/Dezembro/Décembre/Nollaig/Dicembre

1        2        3        4        5        6        7        8

9       10       11       12       13       14       15       16

17       18       19       20       21       22       23       24

25       26       27       28       29       30       31

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. . . and there’s more!

As well as the many hundreds of number challenges here at 7puzzleblog.com, each of the following bullet points describes an educational activity the 7puzzle company is currently involved in:

The main objective of the 7puzzle company is to spread the message about the positive impact games & puzzles can have in the classroom, and thus help to improve the maths skills of children everywhere.

We are able to do this successfully through the innovative PuzzleFriday concept and recommend all schools to invest in our tried and tested packs of resources.

Please feel free to follow my tweets at @7puzzle or get in touch by e-mail at paul@7puzzle.com.

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DAY 238

Today’s Challenge

Here’s an 11-step number trail involving + – × ÷ and the numbers 4 and 5.

We will start with the number 5, then:

  • +5
  • ÷5
  • multiply by 4
  • subtract 4
  • ×5
  • add 5
  • divide by 5
  • add 4
  • 5
  • ÷4
  • ×4

What is your final answer?

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Answers

. . . can be found when clicking this.

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DAY 237

Today’s Challenge

Simply, what is the sum of the first ten odd numbers?

When getting to the above answer, you’ve also found the sum of the first five, six, seven odd numbers, etc. what do you notice about all these answers?

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Answers

. . . can be found when clicking this.

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DAY 236

Today’s Challenge

Study the seven clues below and place the numbers 1-9 into the nine positions of the grid. Each number should appear exactly once:

x              x              x

x              x              x

x              x              x

Clues:

  1. The 6 is higher than the 7, but lower than the 3,
  2. The 3 is further right than the 9,
  3. The 9 is directly above the 2,
  4. The 2 is directly right of the 5,
  5. The 5 is higher than the 1,
  6. The 1 is directly left of the 4,
  7. The 4 is further right than the 7.

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Answers

. . . can be found when clicking this.

7puzzleblog

 

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DAY 235

Today’s Challenge

Using the numbers 4, 5 and 5 once each, with + – × ÷ available, find the NINE different target numbers that are mathematically possible to achieve from 1 to 30.

Click mathematically possible for full details of our numeracy & strategy board game.

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Answers

. . . can be found when clicking this.

7puzzleblog

 

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DAY 234

Today’s Challenge

Using each of the numbers 1.5, 2, 2.5 and 3 once each, and with the four arithmetical operations + – × and ÷ available, can you arrive at the target answer of 7 in three different ways?

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Answers

. . . can be found when clicking this.

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DAY 233

Today’s Challenge

The playing board of the 7puzzle game contains 49 different numbers, the lowest being and the highest 84. Keep that in mind when answering below.

If you write down three separate lists of numbers that could possibly be on the 7puzzle game playing board, the lists being:

  • List 1 – multiples of 9
  • List 2 – factors of 108
  • List 3 – triangular numbers
  1. Which is the only number present on all three lists?
  2. List the seven other numbers that are on exactly two of the lists?
  3. How many different numbers are listed altogether?

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Answers

. . . can be found when clicking this.

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DAY 232

Today’s Challenge

Try the following MATHELONA challenge, taken from our pocket book of challenges. Click MATHELONA for details of Volume 1 of our holiday pocket book.

Can you make all three lines work out arithmetically by replacing the 12 ?’s below with the following 12 digits?

0     1     1     2     2     3     3     4     5     6     6     7

?   +   ?    =      6      =    ?   –   ?
?   +   ?    =      9      =    ?   ×   ?
?   +   ?    =      3      =    ?   ÷   ?

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Answers

. . . can be found when clicking this.

7puzzleblog

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