Author Archives: 7puzzle

DAY/DYDD 17:

The Main Challenge Find the answer to this large number trail which involves fourteen arithmetical steps and includes fraction and percentage calculations. Start with the number 11, then: double it 50% of this +50 subtract thirty-five ÷2 +37 3/5 of … Continue reading

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WELCOME/CROESO

A warm Welsh welcome 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/DYDD 16:

The Main Challenge What is the sum of the 50 integers (or whole numbers) from 1 through to 50 inclusive? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84. The … Continue reading

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DAY/DYDD 15:

The Main Challenge Your task is to multiply two numbers together and then subtract a third number to achieve the target answer of 7. The three numbers used in each calculation must all be unique digits from 1-9. For example, … Continue reading

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DAY/DYDD 14:

The Main Challenge Insert the 12 numbers 1 1 2 2 2 3 5 5 6 7 8 and 8 so that all three lines work out arithmetically: ◯  +  ◯   =     6     =   … Continue reading

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DAY/DYDD 13:

The Main Challenge Starting from 2, list the first seven even numbers that are NOT multiples of 3, 5 or 7. What is the 7th number in your list? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid containing 49 … Continue reading

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DAY/DYDD 12:

The Main Challenge Add together the 7th prime number, the 7th square number, the 7th 2-digit number and the 7th whole number that contains a 7. What is your answer? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 … Continue reading

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DAY/DYDD 11:

The Main Challenge Today’s task is to arrive at the target number of 7 by using the four numbers 7, 7, 7 and 7 once each. All four arithmetic operations + – × ÷ are available. Can you make it? The 7puzzle Challenge The playing … Continue reading

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DAY/DYDD 10:

The Main Challenge Using seven 7’s (7 7 7 7 7 7 and 7) once each, with + – × ÷ available, it is possible to make various target answers, such as 7 as shown here: 7+7+7+7–7–7–7 = 7,  or perhaps 7×(7÷7)×(7÷7)×(7÷7) … Continue reading

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DAY/DYDD 9:

The Main Challenge . . . is from the excellent card game, 24game. Using the numbers 2, 4, 6 and 8 once each, and with all four operations + – × ÷ available, show how you can reach the target number of 24. The … Continue reading

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