Author Archives: 7puzzle

DAY 321:

The Main Challenge This unique Mathematically Possible question asks you to consider three different combinations of numbers by using each number just once and + – × ÷ available.   2   6   10   3   7   10   … Continue reading

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WELCOME

A warm Welsh ‘Croeso’ to 7puzzleblog.com and our compendium of daily number puzzles. Five challenges are posted each day, seven days a week, and designed for our many followers from nearly 170 countries & territories throughout the world. As well as our ever-expanding website … Continue reading

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DAY 320:

The Main Challenge In this particular number puzzle, three UNIQUE digits from 1-9 must be used to arrive at a specified target number; today is 42. The formula is always the same; multiply two numbers together, then either add or subtract … Continue reading

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DAY 319:

The Main Challenge Apart from 8+3+2+1, list the FOUR other ways of making 14 when adding together four unique digits from 1-9 in our latest Kakuro-type challenge. The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid containing … Continue reading

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DAY 318:

The Main Challenge Using the numbers 2, 5 and 10 once each, with + – × ÷ available, which ELEVEN target numbers from 1-30 are mathematically possible to achieve? This is a number puzzle associated with our board game, Mathematically Possible, an excellent resource involving mental … Continue reading

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DAY 317:

The Main Challenge Here is a number puzzle similar in concept to my FlagMath card game. Many schools are now playing the various editions, so here’s a taster: Each of the eight letters, A-H, in the two sections contain a calculation with … Continue reading

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DAY 316:

The Main Challenge One from our range of Mathelona number puzzles now available in pocket book format.  Your task is to make all three lines work out arithmetically by filling the 12 gaps with the following numbers: 0     0     … Continue reading

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DAY 315:

The Main Challenge Try this 10-step number trail involving the four arithmetical operations and all the numbers from 1 to 10. Start off with the number 27, then:  divide by 3  subtract 1  multiply by 6  add 2  ÷10  +8  –9 … Continue reading

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DAY 314:

The Main Challenge Today’s task using the excellent, addictive American maths card game 24game is to try and arrive at the target answer of 24 from each of the following seven groups of numbers. In each calculation, all four digits must be … Continue reading

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DAY 313:

The Main Challenge Consider the four groups of numbers 3 3 3, 4 4 4, 5 5 5 and 6 6 6. There are only six target numbers it is possible to make in the range 10-30 when + – … Continue reading

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