Category Archives: 7puzzleblog.com

DAY/DYDD/PÄIVÄ/NAP 164 at 7puzzleblog.com

The Main Challenge You have 12 balls and each ball is numbered differently from 1 to 12.  They are randomly placed into two bags so each bag contains the six numbered balls shown below: Red bag:   2 3 4 6 9 11 … Continue reading

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DAY/DYDD/PÄIVÄ/NAP 163 at 7puzzleblog.com

The Main Challenge Fill the 15 gaps below with the numbers 1-15, once each, so all five lines work out: ◯   +   ◯   =   ◯ ◯   +   ◯   =   ◯ ◯   + … Continue reading

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DAY/DYDD/PÄIVÄ/NAP 162 at 7puzzleblog.com

The Main Challenge Here’s a mini-Mathelona challenge where you must place the eight digits 0, 1, 1, 2, 2, 2, 3 and 4 into the eight gaps so both lines work out arithmetically: ◯  +  ◯   =    4   … Continue reading

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DAY/DYDD/PÄIVÄ/NAP 161 at 7puzzleblog.com

The Main Challenge Three DIFFERENT digits from 1-9 must be used in a particular way to arrive at a specified target number. The rule is to multiply two numbers together, then either add or subtract the third number, so you arrive at … Continue reading

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DAY/DYDD/PÄIVÄ/NAP 160 at 7puzzleblog.com

The Main Challenge Read the following five clues:  I am a 2-digit number,  My 1st digit is bigger than my 2nd digit,  I am less than 50,  I am an odd number,  I am not a prime number. Which number … Continue reading

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DAY/DYDD/PÄIVÄ/NAP 159 at 7puzzleblog.com

The Main Challenge Can you make all three lines work out arithmetically by placing the numbers 1, 2, 3, 4, 5, 6, 10, 11 and 12 into the nine gaps below? ◯   +   ◯   =   ◯◯   +   ◯ … Continue reading

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DAY/DYDD/PÄIVÄ/NAP 158 at 7puzzleblog.com

The Main Challenge Here’s a 10-step number trail involving all four arithmetical operations together with the numbers 1, 2 and 3. Starting with 10, carry out the following steps: add 2 ×1 ÷3 –2 multiply by 3 +1 subtract 3 divide … Continue reading

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DAY/DYDD/PÄIVÄ/NAP 157 at 7puzzleblog.com

The Main Challenge Using each of the decimal numbers 0.1, 0.2, 0.3 and 0.4 once only, and with the four arithmetical operations + – × ÷ available, show how you can arrive at the target answer of 7. The 7puzzle Challenge The playing board of the … Continue reading

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DAY/DYDD/PÄIVÄ/NAP 156 at 7puzzleblog.com

The Main Challenge Can you make all four lines work out arithmetically by placing the digits 0-9 into the 16 gaps in our latest Mathelona challenge? ◯  +  ◯   =    10    =   ◯  +  ◯ ◯  +  ◯ … Continue reading

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DAY/DYDD/PÄIVÄ/NAP 155 at 7puzzleblog.com

The Main Challenge Can you arrive at the target number 81 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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