Author Archives: 7puzzle

DAY 75:

Today’s Challenge Start with the number 13, then follow these ten arithmetic steps: –2     +5     ÷2     ×5     –4     ÷9     +1     ×5     –1     ÷4     =   … Continue reading

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DAY 74:

Today’s Challenge Can you arrive at the target answer of 24 by using each of the digits 3, 3, 3 and 5 exactly once each, and with + – × ÷ available? . The 7puzzle Challenge The playing board of the 7puzzle game is a … Continue reading

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DAY 73:

Today’s Challenge As well as 9+4+1, there are SEVEN other ways of making 14 when adding together three unique digits from 1-9.  List these seven combinations. . The 7puzzle Number 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 72:

Today’s Challenge From the numbers 1 to 20 inclusive, find the only one that remains when you eliminate all square numbers, multiples of 6, factors of 40 and odd numbers. . 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 71:

Today’s Challenge Start at the number 100 and keep on subtracting 7 until the answer is a single-digit number.  What is this single-digit number? . The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, ranging … Continue reading

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DAY 70:

Today’s Challenge Using the numbers 1, 4 and 6 once each with + – × ÷ available, list the SIX numbers that are mathematically possible to make in the range 20-30 inclusive. Details of our Mathematically Possible game is at mathematicallypossible.com. . The 7puzzle Challenge … Continue reading

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DAY 69:

Today’s Challenge If the number sequence 5, 9, 13, 17, 21 . . . is continued, which is the only number from the following list that will appear later in the sequence? 35     43     59     … Continue reading

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DAY 68:

Today’s Challenge Can you arrive at the target number 105 by using the five numbers 1, 2, 3, 4 and 5 exactly once each, and with + – ×  ÷ available? . The 7puzzle Challenge The playing board of the 7puzzle game is a … Continue reading

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DAY 67:

Today’s Challenge Can you correctly replace the 12 ◯’s below with 0, 1, 1, 2, 2, 3, 4, 5, 5, 8, 9 and 9? ◯  +  ◯   =    3    =   ◯  –  ◯ ◯  +  ◯ … Continue reading

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DAY 66:

Today’s Challenge Multiply two numbers together and then add or subtract a third number to reach the target answer of 60. The three numbers used in each calculation must all be digits from 1-9 and in this challenge they can be … Continue reading

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