Author Archives: 7puzzle

DAY 169:

Today’s Challenge Three unique digits from 1-9 must be used to arrive at a specified target number. This is done by multiplying two of these numbers together and either adding or subtracting the third unique number to arrive at your … Continue reading

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DAY 168:

Today’s Challenge The two sections below both contain eight letters, A-H. Each letter has an addition calculation attached, all involving 2-digit numbers. Which is the only letter that has exactly the same answer in both sections? Section 1 D:68+18   … Continue reading

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DAY 167:

Today’s Challenge The rules of Kakuro are very simple. Just like a crossword, fill in the boxes. Each box must contain a number from 1-9. Each run of boxes must add up to the total shown on the left or … Continue reading

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DAY 166:

Today’s Challenge This number trail has seven arithmetical steps.  Start with the number 49, then: √      add nineteen      50% of this      –2      +26      subtract nine      ÷7      = … Continue reading

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DAY 165:

Today’s Challenge In this Kakuro-type question, can you list the only THREE ways of making 18 when adding together five unique digits from 1-9? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, ranging from 2 up to 84. The 4th & … Continue reading

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DAY 164:

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

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DAY 163:

Today’s Challenge The concept behind this challenge is similar to my MATHELONA number puzzles, so please feel free to click the link for details of my popular pocket book of challenges. Replace all 15 ◯’s below with the numbers 1-15, once each, so … Continue reading

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DAY 162:

Today’s Challenge Here’s a mini-MATHELONA challenge where you must replace the eight ◯’s below with the eight digits 0, 1, 1, 2, 2, 2, 3 and 4 so both lines work out arithmetically: ◯  +  ◯   =    4   … Continue reading

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DAY 161:

Today’s Challenge Three unique 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 160:

Today’s Challenge Read the following five clues and work out which number I am today: 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 … Continue reading

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