Monthly Archives: September 2017

DAY 269:

Today’s Challenge There is just one set of three consecutive numbers in ascending order whose sum is less than 50 and follow this sequence:  square number – triangular number – prime number Can you list this set of three numbers? … Continue reading

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WELCOME

A warm welcome to 7puzzleblog.com and our compendium of daily number puzzles which we design for our many followers from over 160 countries & territories. We are also the place to visit for a variety of different mathematical activities, including our exciting … Continue reading

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DAY 268:

Today’s Challenge Find the total of the seven different numbers in the range 65 to 85 that are either multiples of 9, 10, 11 or 12. The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, … Continue reading

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DAY 267:

Today’s Challenge The playing board of Even More Possible, our exciting arithmetic & strategy board game, contains 30 even numbers from 2 up to 60. Using all four numbers 1, 5, 5 and 10 once each, and with + – × ÷ available, which even … Continue reading

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DAY 266:

Today’s Challenge The playing board of Even More Possible, the advanced arithmetic & strategy board game in our Possible Series, contains all 30 even numbers from 2 up to 60. Using the four numbers 2, 4, 7 and 8 once each (created by rolling … Continue reading

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DAY 265:

Today’s 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? … Continue reading

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DAY 264:

Today’s Challenge Your task is to make the four lines below work out arithmetically. Simply replace the ◯’s with digits from 0 to 9, but each digit can only be inserted a maximum of twice. ◯  +  ◯   = … Continue reading

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DAY 263:

Today’s Challenge One of our popular MATHELONA challenges awaits you, can you complete this by making all four lines work out arithmetically?  Replace the 16 ◯’s with digits 0 to 9, but each digit can only be inserted a maximum of twice. … Continue reading

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DAY 262:

Today’s 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 digits … Continue reading

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DAY 261:

Today’s Challenge Your task is to make all four lines below work out arithmetically by replacing the 16 ◯’s with digits from 0 to 9, but each digit can only be used a maximum of twice! Can you complete this MATHELONA challenge? … Continue reading

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