Monthly Archives: July 2018

DAY 205:

The Main Challenge Pair the ten numbers below so that the difference between the two numbers in each pair is exactly divisible by 7: 6    17    28    37    45    58    64    78    … Continue reading

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DAY 204:

The Main Challenge Divide these nine numbers into three groups of three so that the sum of each group is the same: 11     25     35     43     51     63     73     85     91 What … 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, 7 days a week. These are designed for our many followers from over 160 countries & territories throughout the world. As well as our ever-expanding … Continue reading

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DAY 203:

The Main Challenge Starting with the number 7, complete the following sixteen arithmetic steps: multiply by ten 40 percent of this double it multiply the digits together increase by 20 percent divide by three increase by 50 percent one-third of this … Continue reading

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DAY 202:

The Main Challenge If you added together the first seven odd numbers that do not contain a 3, 5 or 7 as part of their number or are not multiples of 3, 5 or 7, what is your answer? The 7puzzle … Continue reading

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DAY 201:

The Main Challenge When playing Mathematically Possible, players analyse which target numbers can (or cannot) be made from the three numbers rolled on their dice, but this particular challenge is slightly different as you are only allowed to add and subtract (+ … Continue reading

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DAY 200:

Today’s Challenge Playing the superb American maths card game, 24game®, can be frustrating but very addictive when testing your arithmetical skills. When using four numbers just once each, with + – × ÷ available, it is only possible to make 24 with one of the … Continue reading

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DAY 199:

The Main Challenge Follow the rules and only one number will remain. Eliminate the following in the range 1-50:   multiples of 3  square numbers  prime numbers  even numbers Which number from 1-50 will be the last one standing? The 7puzzle … Continue reading

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DAY 198:

The Main Challenge What is the LOWEST whole number that satisfies all three criteria below? it is the sum of five consecutive whole numbers, it is the sum of two consecutive odd numbers, it is the sum of three consecutive … Continue reading

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DAY 197:

The Main Challenge There is just one set of three consecutive numbers in ascending order whose sum is less than 50 and follow this sequence:  prime number – cube number – square number What is the sum of these three … Continue reading

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