Monthly Archives: September 2018

DAY 264:

The Main Challenge Your task is to make the four lines below work out arithmetically. Simply place the digits 0 to 9 into the 16 gaps, but each digit must only be inserted a maximum of twice in the whole challenge. … Continue reading

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DAY 263:

The Main Challenge One of our popular Mathelona challenges awaits you; can you complete this by making all four lines work out arithmetically?  Fill the 16 gaps with digits 0 to 9, but each digit can only be inserted a maximum of … Continue reading

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DAY 262:

The Main Challenge Read the following facts to work out my numerical value:  I am a 3-digit number less than 200  I am a multiple of 11  Add 4 to me and I become a multiple of 5  All my … Continue reading

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DAY 261:

The Main Challenge Your task is to make all four lines below work out arithmetically by placing digits from 0 to 9 into the 16 gaps, but each digit can only be used a maximum of twice! Can you complete this Mathelona challenge? … Continue reading

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DAY 260:

The Main Challenge All the following 3-digit numbers are divisible by 3, except one.  Which is the odd one out? 102  111  117  126  132  139  144  153  162  168  174  180 The 7puzzle Challenge The playing board of the 7puzzle game is … Continue reading

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DAY 259:

The Main Challenge From the following list of numbers: 12  14  18  21  25  28  30  33  35  36  40  42  44  48  54  55  56 find the ONLY number remaining when you eliminate multiples of 3, 5 and 7. … Continue reading

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DAY 258:

The Main Challenge Our arithmetic and strategy board game, Mathematically Possible, uses three normal dice involving numbers from 1 to 6, but larger numbers can be introduced to the game simply by using special dice, just as in this challenge. Use … Continue reading

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DAY 257:

The Main Challenge When using the numbers 2, 5 and 7 once each, with + – × ÷ available, can you list the TWELVE target numbers from 1-30 that are mathematically possible to achieve? Full details of our popular arithmetic and strategy board … Continue reading

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DAY 256:

The Main Challenge Start at 7 and subtract 0.1, followed by 0.2, then 0.3 . . . and so on. What is the first answer less than 1 you will arrive at . . . and the first negative number following that? The 7puzzle … Continue reading

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DAY 255:

The Main Challenge Here’s a 2-part, 7-step number trail involving all four arithmetical operations. Part 1: When starting with the number 15, what is your final answer? –1 +2 ×3 ÷4 +5 –6 ×7 Part 2: In a separate calculation, … Continue reading

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