DAY 143:

Today’s Challenge

Start with the number 50, then:

+27      42      divide by 5      ×4      +50%      two-thirds of this      ÷7      =     ?

What is your final answer to this 7-step number trail?

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The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from up to 84.

The 1st & 4th rows of the playing board contain the following fourteen numbers:

2     3     9     10     14     15     22     32     35     40     44     54     60     72

What is the difference between the highest odd number and lowest multiple of 11?

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Answers

. . . can be found when clicking this.

7puzzleblog

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DAY 142:

Today’s Challenge

From the numbers 1-20, eliminate all:

  • square numbers
  • prime numbers
  • triangular numbers
  • multiples of 6

When adding together the numbers that remain, what is your total?

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The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from up to 84.

The 1st & 4th rows of the playing board contain the following fourteen numbers:

2     3     9     10     14     15     22     32     35     40     44     54     60     72

From this list, what is the sum of the multiples of 8?

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Answers

. . . can be found when clicking this.

7puzzleblog

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DAY 141:

Today’s Challenge

One of our easier MATHELONA-style challenges, but still utilising the four arithmetic operations.  Replace the ◯’s with the digits 1, 2, 2, 3, 4, 4, 5 and 6 so both lines work out:

◯  +  ◯   =    6    =   ◯  ×  ◯
◯  –  ◯   =    2    =   ◯  ÷  ◯

If you enjoy this type of number puzzle, click this MATHELONA link for details of our pocket book of challenges.

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The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from up to 84.

The 1st & 4th rows of the playing board contain the following fourteen numbers:

2     3     9     10     14     15     22     32     35     40     44     54     60     72

What is the difference between the two multiples of 7?

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Answers

. . . can be found when clicking this.

7puzzleblog

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WELCOME


A warm welcome to 7puzzleblog.com and our compendium of daily number puzzles which we design and produce for our many followers from over 160 different countries and territories.

As this website is home to the 7puzzle company, we are also the place to visit for a variety of mathematical things, including online maths tuition. Get in touch for further details.

Our aim is to improve basic knowledge and confidence of arithmetic in a fun way, so start your numerical adventure by trying to solve our latest number puzzles shown above!

From our bumper collection of challenges at 7puzzleblog.com, we post TWO number puzzles each day; one of which is related to the 7puzzle game, our signature board game and a superb tool for teachers and parents to utilise with children.

Click on the dates below to access all our number puzzles and we will reply to all comments & answers, 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 also provided.

Paul Godding       Owner, the 7puzzle company

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7puzzleblog

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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

7puzz

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… AND THERE’S MORE!


As well as the many hundreds of number challenges posted on a daily basis here at 7puzzleblog.com, some of the educational activities the 7puzzle company is currently involved in during 2017 are shown below.

You can gather further details of all the following activities by clicking on this about us link:

  • supporting students with one-to-one and online maths tuition,
  • delivering school-based maths/puzzle workshops,
  • designing board games, card games, puzzles & books for use in our workshops and to sell to schools and the general public,
  • encouraging parents to get involved with their children’s mathematical education through our Roll3Dice initiative,
  • . . . and much more!

Please feel free to tweet us at @7puzzle or send an e-mail to paul@7puzzle.com.

7puzz

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DAY 140:

Today’s Challenge

If you added 1+2, then to that answer added 3, then 4, followed by 5, and so on, what is the first answer you would reach that is more than 200?

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The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from up to 84.

The 5th & 7th rows of the playing board contain the following fourteen numbers:

4     6     7     11     16     21     24     27     30     50     70     77     81     84

How many square numbers are listed?

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Answers

. . . can be found when clicking this.

7puzzleblog

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DAY 139:

Today’s Challenge

There are two sections below, both containing ten letters, A-J.  Each letter is linked to a division calculation:

  • Section 1

D:9÷3  H:8÷2  B:12÷3  I:8÷4  A:4÷2  E:24÷6  G:15÷5  C:20÷4  F:25÷5  J:7÷7

  • Section 2

I:6÷2  G:6÷3  D:10÷2  E:12÷4  J:14÷7  B:20÷5  A:18÷6  C:10÷5  F:16÷4  H:15÷3

Which is the only letter to contain the same answer in both sections?

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The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from up to 84.

The 5th & 7th rows of the playing board contain the following fourteen numbers:

4     6     7     11     16     21     24     27     30     50     70     77     81     84

How many pairs of numbers from the list have a sum of 88?

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Answers

. . . can be found when clicking this.

7puzzleblog

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DAY 138:

Today’s Challenge

The two sections below both contain ten letters, A-J, each of which has a multiplication calculation assigned to it:

  • Section 1

C:10×2  J:4×3  F:8×5  D:3×3  I:3×2  G:7×4  B:5×4  H:9×4  E:10×3  A:6×4

  • Section 2

B:12×2  D:6×1  G:8×3  J:5×2  E:6×5  I:6×6  H:8×6  A:9×2  F:7×2  C:6×3

Which is the only letter that contains the same answer in both sections?

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The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from up to 84.

The 5th & 7th rows of the playing board contain the following fourteen numbers:

4     6     7     11     16     21     24     27     30     50     70     77     81     84

Find three different numbers that have a sum of 77.

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Answers

. . . can be found when clicking this.

7puzzleblog

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DAY 137:

Today’s Challenge

It is possible to use seven 5’s (5, 5, 5, 5, 5, 5 and 5) once each, with the four operations + – × ÷, to make all the target numbers from 1 to 5.

For instance, to arrive at the target numbers 1 and 2, you can do:

  • [(5+5)÷5 – (5÷5)] × (5÷5) = 1
  • [(5+5)÷5 – (5÷5)] + (5÷5) = 2

Your task is to show how to arrive at the other target numbers 3, 4 and 5.

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The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from up to 84.

The 5th & 7th rows of the playing board contain the following fourteen numbers:

4     6     7     11     16     21     24     27     30     50     70     77     81     84

What is the difference between the two prime numbers?

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Answers

. . . can be found when clicking this.

7puzzleblog

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DAY 136:

Today’s Challenge

Can you arrive at the target number 55 by using the five numbers 1, 2, 3, 4 and 5 exactly once each, and with + – ×  ÷ available?

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The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from up to 84.

The 5th & 7th rows of the playing board contain the following fourteen numbers:

4     6     7     11     16     21     24     27     30     50     70     77     81     84

What is the sum of the factors of 42?

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Answers

. . . can be found when clicking this.

7puzzleblog

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