DAY 222:

Today’s Challenge

You’ve rolled the numbers 1, 3 and 3 with your three dice.  Using these once each, with + – × ÷ available, find the TWO target numbers from 1-10 that it is not possible to make.

Visit Roll3Dice.com and the hashtag #Roll3Dice for further 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 & 6th rows of the playing board contain the following fourteen numbers:

5    6    7    12    16    18    20    21    33    49    50    56    81    84

From the list, what is the sum of the multiples of 5?

Make 222 Challenge

Can you arrive at 222 by inserting 2, 3, 5 and 6 into the gaps below?

[(◯×◯²÷◯)–0.5]×◯ = 222

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 221:

Today’s Challenge

Group the following numbers into three lots of three so the products of each of the triples are the same. What is this product?

3      4      5      6      7      8      28      30      35

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

5    6    7    12    16    18    20    21    33    49    50    56    81    84

From the list, which pair of numbers have a sum of 77?

Make 221 Challenge

Can you arrive at 221 by inserting 4, 6, 9 and 12 into the gaps below?

(◯+◯)²–√(◯+◯) = 221

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 220:

Today’s Challenge

The ten letters, A-J, in the following two sections each contains a calculation.  Which is the only letter that has the same answer in both sections?

  • Section 1

E:6÷6   I:5+1   G:3+2   A:102   J:4+3   C:5×1   F:6÷3   B:84   H:9÷3   D:4×2

  • Section 2

H:43   A:6÷1   I:3×3   B:61   F:64   J:8÷2   E:5×2   G:4×1   D:93   C:2+1

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 3rd & 4th rows of the playing board contain the following fourteen numbers:

3    10    13    25    32    35    36    42    44    45    54    60    66    80

What is the difference between the smallest and largest odd numbers?

Make 220 Challenge

Can you arrive at 220 by inserting 5, 8, 9 and 10 into the gaps below?

◯²+◯²+5×(◯+◯) = 220

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 219:

Today’s Challenge

Read the following facts:

  • I am a 2-digit number,
  • both my digits are odd,
  • the sum of both digits is less than 10,
  • my 1st digit is smaller than my 2nd digit, and
  • I am a multiple of 3.

Which number 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 3rd & 4th rows of the playing board contain the following fourteen numbers:

3    10    13    25    32    35    36    42    44    45    54    60    66    80

From the list, what is the sum of the multiples of 10?

Make 219 Challenge

Can you arrive at 219 by inserting 4, 5, 6 and 7 into the gaps below?

◯²×◯+8×◯+◯ = 219

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 218:

Today’s Challenge

From all the odd numbers in the range 1-23 inclusive, eliminate all prime numbers and multiples of 3. Which is the only number to remain?

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 3rd & 4th rows of the playing board contain the following fourteen numbers:

3    10    13    25    32    35    36    42    44    45    54    60    66    80

Which number, when 10 is added to it, becomes a square number?

Make 218 Challenge

Can you arrive at 218 by inserting 4, 5, 8 and 9 into the gaps below?

◯²+◯³+(6×◯÷◯) = 218

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 217:

Today’s Challenge

What is the sum of the first seven 2-digit even 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 3rd & 4th rows of the playing board contain the following fourteen numbers:

3    10    13    25    32    35    36    42    44    45    54    60    66    80

How many multiples of 9 are present on this list?

Make 217 Challenge

Can you arrive at 217 by inserting 3, 7, 11 and 14 into the gaps below?

◯×◯×◯–◯ = 217

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 216:

Today’s Challenge

From the list of ten numbers below, find three combinations that total 50.

Each combination must contain three different numbers, and numbers below are allowed to appear in more than one combination.

7       9       10       11       16       17       18       24       25       28

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 3rd & 4th rows of the playing board contain the following fourteen numbers:

3    10    13    25    32    35    36    42    44    45    54    60    66    80

What is the difference between the two prime numbers?

Make 216 Challenge

Can you arrive at 216 by inserting 3, 6, 8 and 9 into the gaps on each line?

  •  (◯×◯+◯)×◯ = 216
  •  ◯×(◯–◯)×◯ = 216

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 215:

Today’s Challenge

By using the four numbers 0.5, 2, 2 and 2 exactly once each, can you arrive at the target answer of 7 with the four arithmetical operations + – × ÷ available to use?

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 & 2nd rows of the playing board contain the following fourteen numbers:

2    8    9    14    15    17    22    28    40    48    55    63    64    72

From the list, find the sum of the multiples of 7.

Make 215 Challenge

Can you arrive at 215 by inserting 4, 10, 20 and 45 into the gaps below?

(◯×◯)÷◯–◯ = 215

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 214:

Today’s Challenge

By using the numbers 4, 5, 7 and 8 exactly once each, and with the four arithmetical operations + – × ÷ available, can you arrive at the target answer of 12?

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 & 2nd rows of the playing board contain the following fourteen numbers:

2    8    9    14    15    17    22    28    40    48    55    63    64    72

From the list, find FOUR different numbers that total 100.

Make 214 Challenge

Can you arrive at 214 by inserting 6, 8, 10 and 14 into the gaps below?

(◯+◯)×◯–◯ = 214

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 213:

Today’s Challenge

This Kakuro challenge is ideal for any beginners to this fantastic puzzle. Your number skills will improve the more of these you attempt. The rules are very simple:

  • Just like a crossword, fill in the boxes
  • Each box must contain a number from 1-9 and each run of boxes must add up to the total shown on the left or above
  • Digits cannot be repeated in each run, so if a total of 4 is to be completed in 2 boxes, they must be made up of either 3+1 or 1+3, but not 2+2

Here is a Kakuro puzzle to try today:

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 & 2nd rows of the playing board contain the following fourteen numbers:

2    8    9    14    15    17    22    28    40    48    55    63    64    72

What is the difference between the highest and lowest square numbers?

Make 213 Challenge

Can you arrive at 213 by inserting 3, 4, 5 and 15 into the gaps below?

(◯×◯–◯)×◯ = 213

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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