Category Archives: 7puzzleblog.com

day/dydd 265 at 7puzzleblog.com

The Main Challenge … is a typical challenge from the excellent American maths card game, 24game®. Using the four numbers 2, 4, 4 and 9 once each, with + – × ÷ available, can you arrive at the target number of 24? The 7puzzle … Continue reading

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day/dydd 264 at 7puzzleblog.com

The Main Challenge Your task is to make the four lines below work out arithmetically. Simply place the digits 0 to 9 into the 16 gaps, but each digit must only be inserted a maximum of twice in the whole challenge. … Continue reading

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day/dydd 263 at 7puzzleblog.com

The Main Challenge One of our popular Mathelona challenges awaits you; can you complete this by making all four lines work out arithmetically?  Fill the 16 gaps with digits 0 to 9, but each digit can only be inserted a maximum of … Continue reading

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day/dydd 262 at 7puzzleblog.com

The Main Challenge Read the following facts to work out my numerical value:  I am a 3-digit number less than 200  I am a multiple of 11  Add 4 to me and I become a multiple of 5  All my … Continue reading

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day/dydd 261 at 7puzzleblog.com

The Main Challenge Your task is to make all four lines below work out arithmetically by placing digits from 0 to 9 into the 16 gaps, but each digit can only be used a maximum of twice! Can you complete this Mathelona challenge? … Continue reading

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day/dydd 260 at 7puzzleblog.com

The Main Challenge All the following 3-digit numbers are divisible by 3, except one.  Which one? 102  111  117  126  132  139  144  153  162  168  174  180 The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid of 49 … Continue reading

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day/dydd 259 at 7puzzleblog.com

The Main Challenge From the following list of numbers: 12  14  18  21  25  28  30  33  35  36  40  42  44  48  54  55  56 find the ONLY number remaining when you eliminate multiples of 3, 5 and 7. … Continue reading

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day/dydd 258 at 7puzzleblog.com

The Main Challenge Using the numbers 2, 4 and 10 once each, with + – × ÷ available, can you list the FOURTEEN target numbers from 1-30 that are mathematically possible to achieve? The 7puzzle Challenge The playing board of the 7puzzle game is a … Continue reading

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day/dydd 257 at 7puzzleblog.com

The Main Challenge In the following multiplication magic square, the numbers in each of the rows, columns and diagonals multiply together to give the same result; 1000. Two of the numbers have been given to you: x       … Continue reading

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day/dydd 256 at 7puzzleblog.com

The Main Challenge Start at 7 and subtract 0.1, followed by 0.2, then 0.3 . . . and so on. What is the first answer less than 1 you will arrive at . . . and the first negative number following that? The 7puzzle … Continue reading

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