Author Archives: 7puzzle

DAY 43:

Today’s Challenge Using the numbers 2, 4 and 6 once each, together with + – × ÷, find the SIX target numbers from the following list that are mathematically possible to make: 12     14     16     18 … Continue reading

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DAY 42:

Today’s Challenge You’ve rolled the numbers 2, 4 and 6 with your three dice.  Using these once each, with + – × ÷ available, find the THREE target numbers from 1-10 that it is not possible to make. Visit Roll3Dice.com and hashtags #Roll3Dice #LearnTogether #R3D for further … Continue reading

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DAY 41:

Today’s Challenge . . . is all the way from Japan.  Can you insert 1, 4, 6 and 8 into the four gaps on each line so all three answers equal 20?  (◯–◯)×(◯–◯) = 20  (◯÷◯+◯)×◯ = 20  (◯+◯)×◯–◯ = 20 … Continue reading

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DAY 40:

Today’s Challenge In each group below, use the four numbers once each, with + – × ÷ available:  3   3   3   3  4   4   4   4  5   5   5   5  6   6 … Continue reading

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DAY 39:

Today’s Challenge By allocating each letter of the English alphabet a numerical value as follows, A=1 B=2 C=3 . . . Z=26, the value of the word CAT would be 24, which is calculated by doing 3+1+20.  Following this rule, … Continue reading

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DAY 38:

Today’s Challenge Allocate each letter of the English alphabet a numerical value as follows, A=1 B=2 C=3 . . . Z=26.  For instance, the value of the word DOG is 26 and calculated by doing 4+15+7. Follow this rule to … Continue reading

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DAY 37:

Today’s Challenge If you add 1+4, then to that answer add 9, then keep on adding consecutive square numbers to the previous total, what is the first answer you reach that is greater than 200? (Hint: Square numbers are 1×1=1, … Continue reading

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DAY 36:

Today’s Challenge You’ve rolled the numbers 2, 3 and 4 with your three dice.  Using these once each, with + – × ÷ available, find the lowest whole number it is not possible to make. Visit Roll3Dice.com and the hashtags #Roll3Dice #LearnTogether for further details. … Continue reading

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DAY 35:

Today’s Challenge Try the following 20 steps in your head.  Start with the number 12, then: ÷2     –1     ×5     –5     ×3     –6     ÷2     –3     ÷3     ×2 –10     … Continue reading

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DAY 34:

Today’s Challenge Can you replace all 12 ◯’s in the Addition-only MATHELONA puzzle below? ◯   +   ◯   =   ◯ ◯   +   ◯   =   ◯ ◯   +   ◯   =   ◯ ◯   … Continue reading

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