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The Main Challenge

This number trail contains ten arithmetical steps. Start with the number 40, then:

  •  subtract twenty-six
  •  ÷7
  •  ×10
  •  30% of this
  •  multiply by 3
  •  two-thirds of this
  •  ×12
  •  double it
  •  add fifteen
  •  ÷3

What is your final answer?

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The 7puzzle Challenge

The playing board of Buy Xanax Pills Online is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.

The 6th & 7th rows of the playing board contain the following fourteen numbers:

4   5   11   12   18   20   24   27   30   33   49   56   70   77

How many multiples of 3 are on the list?

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The Factors Challenge

Which is the ONLY number on the following list that is a factor of 301?

3     5     7     9     11     13     15     17    19

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The Mathematically Possible Challenge

Using 38 and 10 once each, with + – × ÷ available, which is the ONLY number it is possible to make from the list below?

8    16    24    32    40    48    56    64    72    80

#8TimesTable

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The Target Challenge

Can you arrive at 301 by inserting 2, 3, 4, 5 and 6 into the gaps below?

  •  ◯+◯³+◯×(◯–◯) = 301

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Here’s a Mathelona challenge for you to try based on the ones found in my pocket book, details of which can be found by clicking Buy Genuine Valium.

You must make all four lines work out arithmetically by filling the 16 gaps with digits from 0 to 9.  Remember, each digit can only be inserted a maximum of TWICE:

◯  +  ◯   =    13    =   ◯  +  ◯
◯  +  ◯   =     8     =   ◯  –  ◯
◯  +  ◯   =    12    =   ◯  ×  ◯
◯  +  ◯   =     2     =   ◯  ÷  ◯

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The 7puzzle Challenge

The playing board of Buy Xanax Pills Online is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.

The 4th & 5th rows contain the following fourteen numbers:

3   6   7   10   16   21   32   35   44   50   54   60   81   84

What is the sum of the factors of 70 listed above?

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The Factors Challenge

Which is the ONLY number in the following list that is not a factor of 300?

2    3    4    5    6    9    10    12    15    20

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The Mathematically Possible Challenge

Using 38 and 10 once each, with + – × ÷ available, which are the only THREE numbers it is possible to make from the list below?

7    14    21    28    35    42    49    56    63    70

#7TimesTable

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The Target Challenge

Can you arrive at 300 by inserting 10, 20, 30, 40 and 50 into the gaps below?

  •  ◯²–◯×◯÷(◯–◯) = 300

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The Main Challenge

Which is the only 2-digit number to have exactly SEVEN factors?

. . . and an additional challenge for the number puzzle enthusiast; which is the only 3-digit number to have exactly SEVEN factors?

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The 7puzzle Challenge

The playing board of Buy Xanax Pills Online is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.

The 4th & 5th rows contain the following fourteen numbers:

3   6   7   10   16   21   32   35   44   50   54   60   81   84

What is the sum of the two square numbers?

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The Factors Challenge

Which is the ONLY number on the following list that is a factor of 299?

3     5     7     9     11     13     15     17    19

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The Mathematically Possible Challenge

Using 38 and 10 once each, with + – × ÷ available, which are the only TWO numbers it is possible to make from the list below?

6    12    18    24    30    36    42    48    54    60

#6TimesTable

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The Target Challenge

Can you arrive at 299 by inserting 8, 9, 10, 11 and 12 into the gaps below?

  •  (◯+◯)×◯+(◯×◯) = 299

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The Main Challenge

Read the following facts and work out which number I am today:

  •  I am a 2-digit number,
  •  One of my digits is odd, the other is even,
  •  I have six factors,
  •  I am a multiple of 5 but not a multiple of 10.

Who am I?

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The 7puzzle Challenge

The playing board of Buy Xanax Pills Online is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.

The 4th & 5th rows contain the following fourteen numbers:

3   6   7   10   16   21   32   35   44   50   54   60   81   84

List FOUR sets, each containing three numbers, that all have a sum of 100.

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The Factors Challenge

Which of the following numbers are factors of 298?

4     6     8     10     12     14     16     18    None of them

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The Mathematically Possible Challenge

Using 38 and 10 once each, with + – × ÷ available, which are the only THREE numbers it is possible to make from the list below?

5    10    15    20    25    30    35    40    45    50

#5TimesTable

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The Target Challenge

Can you arrive at 298 by inserting 1, 2, 3, 4 and 5 into the gaps below?

  •  (◯³×◯)+(◯×◯×◯) = 298

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The Main Challenge

This is a typical number puzzle from fellow designer, Kojiro Tominga, who is based in Yokohama, Japan.

Using 5, 5, 5 and 5, with – × ÷ available, can you make each of the target numbers 5, 10, 15, 20, 25, 30 and 35?

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The 7puzzle Challenge

The playing board of Buy Xanax Pills Online is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.

The 4th & 5th rows contain the following fourteen numbers:

3   6   7   10   16   21   32   35   44   50   54   60   81   84

What is double the lowest multiple of 9 found on the list?

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The Factors Challenge

Which THREE of the following numbers are factors of 297?

3     5     7     9     11     13     15     17

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The Mathematically Possible Challenge

Using 810 and 12 once each, with + – × ÷ available, which are the only TWO numbers it is possible to make from the list below?

100   102   104   106   108   110   112   114   116   118   120

#EvenNumbers

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The Target Challenge

Can you arrive at 297 by inserting 1, 2, 3, 4 and 5 into the gaps below?

  •  ◯²×(◯+◯)×(◯²–◯) = 297

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The Main Challenge

Using any five numbers from 1-5 (more than once each if required) and with + – × ÷ available, can you find THREE different ways to make the target number 86?

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The 7puzzle Challenge

The playing board of Buy Xanax Pills Online is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.

The 4th & 5th rows contain the following fourteen numbers:

3   6   7   10   16   21   32   35   44   50   54   60   81   84

What is the difference between the two largest odd numbers?

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The Factors Challenge

Which TWO of the following numbers are factors of 296?

4     6     8     10     12     14     16

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The Mathematically Possible Challenge

Using 810 and 12 once each, with + – × ÷ available, which is the ONLY number it is possible to make from the list below?

90    91    92    93    94    95    96    97    98    99

#NumbersIn90s

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The Target Challenge

Can you arrive at 296 by inserting 1, 3, 5, 6 and 7 into the gaps below?

  •  (◯×◯+◯)×(◯²–◯) = 296

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The Main Challenge

. . . is from Volume 1 of our Mathelona pocket book. You have a limited amount of numbers to work with, so can you make all three lines work out arithmetically by filling the 12 gaps with these numbers?

1     2     2     2     3     4     4     4     8     8     8     8

◯  +  ◯   =     5     =   ◯  –  ◯
◯  +  ◯   =    16    =   ◯  ×  ◯
◯  +  ◯   =     4     =   ◯  ÷  ◯

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The 7puzzle Challenge

The playing board of Buy Xanax Pills Online is a 7-by-7 grid of 49 different numbers, ranging from up to 84.

The 2nd & 3rd rows contain the following fourteen numbers:

8   13   17   25   28   36   42   45   48   55   63   64   66   80

There are two numbers on the list that are consecutive. What is their sum?

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The Factors Challenge

Which of the following numbers are factors of 295?

3     5     7     9     11     13     15

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The Mathematically Possible Challenge

Using 810 and 12 once each, with + – × ÷ available, which is the ONLY number it is possible to make from the list below?

80    81    82    83    84    85    86    87    88    89

#NumbersIn80s

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The Target Challenge

Can you arrive at 295 by inserting 3, 3, 4, 5 and 6 into the gaps below?

  •  (◯³÷◯–◯²+◯)×◯ = 295

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The Main Challenge

This Banana & Clock Puzzle caused quite a stir and promoted lots of discussion on twitter last year:

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What do you think the answer on the final line is?

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The 7puzzle Challenge

The playing board of Buy Xanax Pills Online is a 7-by-7 grid of 49 different numbers, ranging from up to 84.

The 2nd & 3rd rows contain the following fourteen numbers:

8   13   17   25   28   36   42   45   48   55   63   64   66   80

What is the difference between the highest and lowest multiples of 6?

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The Factors Challenge

Which FOUR from the following list of numbers are factors of 294?

2     3     4     5     6     7     8     9

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The Mathematically Possible Challenge

Using 810 and 12 once each, with + – × ÷ available, which is the ONLY number it is possible to make from the list below?

60    61    62    63    64    65    66    67    68    69

#NumbersIn60s

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The Target Challenge

Can you arrive at 294 in two different ways when inserting 3, 4, 5, 6 and 7 into the gaps below?

  •  ◯×◯×(◯×◯–◯) = 294

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The Main Challenge

Here is a FlagMath-style puzzle derived from our series of card games.

Each of the eleven letters, A-K, in the two sections below contains a percentage calculation. Which is the only letter to have the SAME answer in BOTH sections?

  • Section 1

F: 40% of 60    A: 25% of 20    G: 50% of 30    B: 60% of 35    D: 20% of 40    J: 30% of 5   K: 16% of 50    C: 70% of 30    H: 15% of 60    E: 10% of 100    I: 5% of 80

  • Section 2

H: 1% of 500    D: 80% of 10    K: 2% of 200    G: 30% of 80    J: 20% of 50    F: 10% of 40   C: 25% of 60    I: 70% of 20    A: 15% of 200    E: 5% of 140    B: 8% of 300

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The 7puzzle Challenge

The playing board of Buy Xanax Pills Online is a 7-by-7 grid of 49 different numbers, ranging from up to 84.

The 2nd & 3rd rows contain the following fourteen numbers:

8   13   17   25   28   36   42   45   48   55   63   64   66   80

When finding the highest multiple of 7 on the list, what is double this number?

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The Factors Challenge

Which of the following numbers are factors of 293?

3     5     7     9     11     13     None of them

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The Mathematically Possible Challenge

Using 810 and 12 once each, with + – × ÷ available, which is the ONLY number it is possible to make from the list below?

2    3    5    7    11    13    17    19    23    29

#PrimeNumbers

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The Target Challenge

Can you arrive at 293 in two different ways when inserting 4, 9, 16, 25 and 36 into the gaps below?

  •  ◯²+◯+√◯+√(◯×◯) = 293

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Following on from Buy Real Diazepam Uk, here’s another one of the unique Keith Number challenges made famous by Mike Keith and similar to the Fibonacci sequence. If you like playing around with numbers, you’ll love having a go at this fun concept.

The 1st 2-digit Keith Number14, is worked out by following a pattern:

  •    1   4   5   9   14

1+4=5; 4+5=9; 5+9=14 (the total arrives back to the original number).

The 2nd 2-digit Keith Number19, is worked out in a similar way:

  •    1   9   10   19

1+9=10; 9+10=19 (the total again arrives back to the original number).

By following this pattern, the 3rd and 4th 2-digit Keith Numbers are 28 and 47:

  •    2   8   10   18   28
  •    4   7   11   18   29   47

Can you continue this process and locate the only other two Keith Numbers below 100?

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The 7puzzle Challenge

The playing board of Buy Xanax Pills Online is a 7-by-7 grid of 49 different numbers, ranging from up to 84.

The 2nd & 3rd rows contain the following fourteen numbers:

8   13   17   25   28   36   42   45   48   55   63   64   66   80

What is the sum of the square numbers?

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The Factors Challenge

Which of the following numbers are factors of 292?

6    8    10    12    14    16    18    None of them

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The Mathematically Possible Challenge

Using 810 and 12 once each, with + – × ÷ available, which are the only TWO numbers it is possible to make from the list below?

1    4    9    16    25    36    49    64    81    100

#SquareNumbers

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The Target Challenge

Can you arrive at 292 by inserting 2, 3, 4, 5 and 6 into the gaps below?

  •  ◯×(◯³×◯²+(◯–◯)²) = 292

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