DAY 250:

Today’s Challenge

The following clues are given to help you find a particular number:

  • I am a 2-digit number
  • my two digits have a difference of one
  • I am a multiple of 7
  • the number immediately below me is a prime number

Who am I?

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

How many multiples of 4 are present?

Make 250 Challenge

Can you arrive at 250 by inserting 5, 10, 15, 20 and 25 into the gaps below?

◯×◯–(◯²+◯+◯) = 250

Answers can be found here.

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

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DAY 249:

Today’s Challenge

Here’s a challenging number trail question involving seven arithmetical steps.  Start with the number 139, then:

8     +103     decrease by 50%     37     +109     1/3 of this     ÷7     =     ?

What is your final answer?

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

How many pairs of numbers have a sum of 75?

Make 249 Challenge

Can you arrive at 249 by inserting 1, 2, 3, 4 and 5 into the gaps below?

(◯×◯ ÷◯)–√◯ = 249

Answers can be found here.

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

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DAY 248:

Today’s Challenge

What is the lowest Prime Number total it is possible to achieve when adding together seven unique non-Prime Numbers?

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 sum of the factors of 40?

Make 248 Challenge

Can you arrive at 248 by inserting 5, 7, 8, 10 and 12 into the gaps below?

◯³+√(◯+◯+◯)–◯² = 248

Answers can be found here.

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

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DAY 247:

Today’s Challenge

Can you complete this MATHELONA task by making the three lines work out arithmetically when inserting the 12 gaps below with the following 12 digits?

0      1      2      2      3      3      4      5      6      7      8      9

◯  +  ◯   =     3     =   ◯  –  ◯
◯  +  ◯   =    10    =   ◯  ×  ◯
◯  +  ◯   =     9     =   ◯  ÷  ◯

Further details of our pocket book of challenges can be found by clicking MATHELONA.

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

Which pair of numbers have a difference of 9?

Make 247 Challenge

Can you arrive at 247 by inserting 3, 4, 5, 6 and 7 into the gaps below?

(◯+◯)×◯×◯–◯ = 247

Answers can be found here.

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

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DAY 246:

Today’s Challenge

The seven musical letters, A-G, in the three sections below each contain an addition calculation.  Which is the only letter that has the same answer in all three sections?

  • Section 1

E: 11+6    G: 7+7    C: 10+4    A: 13+6    B: 9+4    F: 8+8    D: 9+3

  • Section 2

A: 11+5    C: 13+5    F: 9+6    E: 15+3    D: 6+6     B: 8+5    G: 7+6

  • Section 3

C: 11+3    B: 11+2    D: 7+4    G: 14+1    F: 12+3    E: 14+3    A: 15+4

Visit FlagMath.com for details of similar numerical challenges in our card game.

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

Which two separate numbers, when 9 is added to them, each become square numbers?

Make 246 Challenge

Can you arrive at 246 by inserting 3, 4, 5, 6 and 7 into the gaps below?

(◯×◯+◯×◯)×◯ = 246

Answers can be found here.

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

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DAY 245:

Today’s Challenge

Using the numbers 5, 5 and 10 once each with + – × ÷ available, list the nine target numbers from 1-30 that are mathematically possible to achieve.

Click Mathematically Possible to visit our arithmetic and strategy board game.

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

Which four different numbers have a sum of 100?

Make 245 Challenge

Can you arrive at 245 by inserting 4, 5, 6, 8 and 9 into the gaps below?

◯×◯×◯–◯×◯+7 = 245

Answers can be found here.

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

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DAY 244:

Today’s Challenge

Consider all odd numbers from 1 through to 23. Eliminate all single-digit numbers and multiples of 7 as well as numbers that have their two digits adding up to an even number.

Which number is the last one remaining?

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

From the list, what is the sum of the multiples of 4?

Make 244 Challenge

Can you arrive at 244 by inserting 4, 9, 16, 25 and 36 into the gaps below?

(◯+◯)×√◯×√◯–√◯ = 244

Answers can be found here.

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

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DAY 243:

Today’s Challenge

We invite you to use seven 3’s (3, 3, 3, 3, 3, 3 and 3) once each, with + – × ÷ available, to make various target numbers.

For instance, to make 1 and 2, you could do:

  • [3 × (3÷3)] – (3÷3) – (3÷3)  =  1
  • [(3+3) ÷ 3] × (3÷3) × (3÷3)  =  2  . . .  and so on.

Continuing as above, can you make the target numbers from 3 to 6?

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 from the list that have a sum of 100.

Make 243 Challenge

Can you arrive at 243 by inserting 2, 3, 4, 5 and 6 into the gaps below?

◯×(◯+◯)²+(◯+◯)² = 243

Answers can be found here.

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

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DAY 242:

Today’s Challenge

If the number sequence 4, 10, 16, 22, 28 . . . is continued, which is the only number from the following list that will NOT appear later in the sequence?

64     70     74     76     82     88     94

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 multiples of 3 are listed above?

Make 242 Challenge

Can you arrive at 242 by inserting 4, 5, 6, 7 and 8 into the gaps below?

(◯+◯)×(◯+◯)×(10–◯) = 242

Answers can be found here.

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

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DAY 241:

Today’s Challenge

You’ve rolled the numbers 3, 5 and 6 with three dice.  Using these once each, with + – × ÷ available, which three target numbers from 1-10 are NOT possible to make?

Visit Roll3Dice.com and the hashtags #Roll3Dice and #R3D for details.

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 multiples of 10?

Make 241 Challenge

Can you arrive at 241 by inserting 1, 3, 5, 7 and 9 into the gaps on each line?

  •  ◯³+(◯+◯)²+2×(◯–◯) = 241
  •  ◯³+(◯+◯)²+3×(◯–◯) = 241

Answers can be found here.

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

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