DAY 55:

Today’s Challenge

‘Can You Pass A Simple Math Test?’ was recently published in the United States and contains five multiple choice questions.  Answer A, B, C or D each time.

  1. How many seconds are in 2 hours?       A 8,300   B 7,200   C 3,600   D 9,000
  2. What is (4×5)+(718÷3)?       A 42   B 74   C 23   D 21
  3. Calculate 235×13.       A 3,125   B 3,055   C 3,575   D 3,315
  4. If c+d=d, what must the value of c equal?       A 1   B 0.5   C 0   D 1
  5. Which decimal number is equivalent to 3/5?       A 0.35   B 0.53   C 0.6   D 0.3

The 7puzzle Challenge

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

The 1st & 5th rows contain the following fourteen numbers:

2   6   7   9   14   15   16   21   22   40   50   72   81   84

What is the sum of the multiples of 9?

Make 55 Challenge

Can you arrive at 55 by inserting 2, 5, 10 and 15 into the gaps on each line?

  •  ◯×◯–◯×◯ = 55
  •  (◯+◯)×◯+◯ = 55
  •  (◯+◯)×◯–◯ = 55
  •  (◯–◯)×◯+◯ = 55
  •  (◯–◯)×◯–◯ = 55

Answers can be found here.

Click Paul Godding for details of online maths tuition. Wherever you are in the world, please get in touch.

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DAY 54:

Today’s Challenge

When 2 is subtracted from a 2-digit number and the result doubled, it becomes the same 2-digit number but with its digits reversed.

Only one 2-digit number has this property. What is it?

The 7puzzle Challenge

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

The 1st & 5th rows contain the following fourteen numbers:

2   6   7   9   14   15   16   21   22   40   50   72   81   84

Which three different numbers from the list have a sum of 77?

Make 54 Challenge

Can you arrive at 54 by inserting 2, 5, 8 and 12 into the gaps on each line?

  •  ◯×◯+◯+◯ = 54
  •  ◯×◯+◯–◯ = 54
  •  (◯–◯)×◯–◯ = 54
  •  (³√◯+◯÷◯)×◯ = 54

Answers can be found here.

Click Paul Godding for details of online maths tuition. Wherever you are in the world, please get in touch.

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WELCOME

A warm welcome to 7puzzleblog.com and our compendium of daily number puzzles which are designed for our many followers from over 160 countries & territories worldwide.

This is also the place to read about our variety of mathematical activities, including an exciting and successful venture into online maths tuition worldwide.

The World’s #1 Daily Number Puzzle Website

Simply type daily number puzzles into Google or Bing and you’ll see 7puzzleblog.com officially listed at #1. We appreciate and value your continued support.

Our aim

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.

How to use our website

As well as our most recent challenges above, you can click on the dates below to access the remainder of our number puzzles. We will reply to all comments & answers as well as tweets to @7puzzle and e-mails to paul@7puzzle.com.

We post at least three number puzzles each day from our bumper collection of challenges, one of which is always related to the 7puzzle game.

Our signature board game is a superb tool for teachers and parents to utilise with children as well as their own personal challenge.

Spread the message

Please tell family, friends, students, colleagues and puzzle enthusiasts about our fabulous daily number puzzles at 7puzzleblog.comAnswers are also provided.

Paul Godding

Author/Awdur/Autor/Autor/Auteur/Údar/Autore

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

. . . and there’s more!

As well as the thousands of number challenges we continue to develop, some of the other educational activities we are involved in are listed here:

  • supporting students with one-to-one, face-to-face maths tuition locally,
  • . . . and one-to-one online math tuition worldwide,
  • delivering school & university-based maths/puzzle workshops all over the UK,
  • designing board games, card games, puzzles & pocket books that are available for schools, parents and the general public to invest in,
  • advising schools on how to improve children’s general arithmetic & social skills by implementing our PuzzleFriday programme.

Further details of all the above can be found by exploring the various pages of this website.

Remember, you are always welcome to contact us on twitter @7puzzle or e-mail paul@7puzzle.com if you have any queries. Enjoy your visit!

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DAY 53:

Today’s Challenge

From the numbers below, eliminate all square numbers, triangular numbers, multiples of 4 and factors of 70.

1  2  3  4  5  6  7  8  9  10  12  14  15  16  18  20  21  24  25

Which is the only number left remaining?

The 7puzzle Challenge

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

The 1st & 5th rows contain the following fourteen numbers:

2   6   7   9   14   15   16   21   22   40   50   72   81   84

What is the difference between the lowest and highest multiples of 5?

Make 53 Challenge

Can you arrive at 53 by inserting 4, 4, 5 and 6 into the gaps on each line?

  •  (◯+◯)×◯+◯ = 53
  •  ◯²+◯×◯+◯ = 53
  •  ◯²×◯–(◯+◯) = 53

Answers can be found here.

Click Paul Godding for details of online maths tuition. Wherever you are in the world, please get in touch.

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DAY 52:

Today’s Challenge

List the FIVE 2-digit numbers to have the following attributes:

  •  are not odd numbers,
  •  are not multiples of 3, 4, or 7,
  •  has its digits adding up to more than 10.

The 7puzzle Challenge

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

The 1st & 5th rows contain the following fourteen numbers:

2   6   7   9   14   15   16   21   22   40   50   72   81   84

What is the sum of the factors of 36?

Make 52 Challenge

Can you arrive at 52 by inserting 4, 6, 8 and 9 into the gaps on each line?

  •  ◯×◯–◯÷◯ = 52
  •  ◯²–(◯+√◯×√◯) = 52
  •  ◯²+◯×(◯–◯)² = 52
  •  (√◯×◯+◯)×√ = 52

Answers can be found here.

Click Paul Godding for details of online maths tuition. Wherever you are in the world, please get in touch.

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DAY 51:

Today’s Challenge

Using each of the numbers 0.1, 0.5, 3 and 6 once each, and with the four arithmetical operations available, can you arrive at the target answer of 7 by two different ways?

The 7puzzle Challenge

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

The 1st & 5th rows contain the following fourteen numbers:

2   6   7   9   14   15   16   21   22   40   50   72   81   84

Which three different numbers have a sum that is also on the list?

Make 51 Challenge

Can you arrive at 51 by inserting 4, 5, 6 and 7 into the gaps on each line?

  •  (+)×◯+◯ = 51
  •  ◯²+(◯+◯)÷ = 51
  •  ◯×◯++◯ = 51
  •  ◯×(◯+√◯)– = 51
  •  ()²×+◯ = 51

Answers can be found here.

Click Paul Godding for details of online maths tuition. Wherever you are in the world, please get in touch.

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DAY 50:

Today’s Challenge

Using the numbers 4, 5 and 6 once each, together with + – × ÷, which THREE target numbers from the following list are NOT mathematically possible to make?

2    3    4    5    6    7    10    12    14    15    19    20    26    29    30

The 7puzzle Challenge

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

The 3rd & 7th rows contain the following fourteen numbers:

4   11   13   24   25   27   30   36   42   45   66   70   77   80

What is the difference between the highest and lowest multiples of 7?

Make 50 Challenge

Can you arrive at 50 by inserting 2, 5, 10 and 20 into the gaps on each line?

  •  ²–◯×◯÷ = 50
  •  (+)×◯+◯ = 50
  •  ◯⁵+◯–◯÷◯ = 50

Answers can be found here.

Click Paul Godding for details of online maths tuition. Wherever you are in the world, please get in touch.

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DAY 49:

Today’s Challenge

You roll two normal six-sided dice, both containing the numbers 1-6.  If you multiplied the two numbers that show, how many DIFFERENT answers is it possible to obtain?

The 7puzzle Challenge

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

The 3rd & 7th rows contain the following fourteen numbers:

4   11   13   24   25   27   30   36   42   45   66   70   77   80

What is the sum of the factors of 90?

Make 49 Challenge

Can you arrive at 49 by inserting 1, 2, 3 and 4 into the gaps on each line?

  •  (+)²×()² = 49
  •  (+)²×√◯ = 49
  •  ◯(+)×◯ = 49

Answers can be found here.

Click Paul Godding for details of online maths tuition. Wherever you are in the world, please get in touch.

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DAY 48:

Today’s Challenge

What is the biggest integer (whole number) less than 630,000 that can be written using all of the six digits from 1 to 6?

The 7puzzle Challenge

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

The 3rd & 7th rows contain the following fourteen numbers:

4   11   13   24   25   27   30   36   42   45   66   70   77   80

From the list, find three different numbers that have a sum of 100.

Make 48 Challenge

Can you arrive at 48 by inserting 4, 4, 5 and 8 into the gaps on each line?

  •  ◯×◯+◯+ = 48
  •  ◯×◯×(◯–◯) = 48
  •  ◯²+–(◯×◯) = 48

Answers can be found here.

Click Paul Godding for details of online maths tuition. Wherever you are in the world, please get in touch.

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DAY 47:

Today’s Challenge

If you multiply a certain number by 3 and then add 30, the result is the same as if you first added 17 to this number and then multiplied by 2.  Is the value of this number 1, 2, 3, 4 or 5?

The 7puzzle Challenge

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

The 3rd & 7th rows contain the following fourteen numbers:

4   11   13   24   25   27   30   36   42   45   66   70   77   80

What is the product of the lowest number and highest number?

Make 47 Challenge

Can you arrive at 47 by inserting 2, 6, 7 and 10 into the gaps on each line?

  •  ◯×◯+◯÷ = 47
  •  ◯²(◯+◯)÷ = 47
  •  (◯+◯)²–(+◯) = 47

Answers can be found here.

Click Paul Godding for details of online maths tuition. Wherever you are in the world, please get in touch.

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