Category Archives: 7puzzleblog.com

day/dydd 18 at 7puzzleblog.com

The Main Challenge All nine numbers from 21 to 29 inclusive must be allocated to a letter below so that each allocated number satisfies the condition given on the line:  (a)  even number,  (b)  factor of 144,  (c)  power of 3,  (d)  prime … Continue reading

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day/dydd 17 at 7puzzleblog.com

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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day/dydd 16 at 7puzzleblog.com

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 at 7puzzleblog.com

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 at 7puzzleblog.com

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 at 7puzzleblog.com

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 at 7puzzleblog.com

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 at 7puzzleblog.com

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 do it? The 7puzzle … Continue reading

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day/dydd 10 at 7puzzleblog.com

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 at 7puzzleblog.com

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 7puzzle … Continue reading

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