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# Monthly Archives: May 2017

## DAY 152:

Today’s Challenge Using the three numbers 1, 2 and 4 just once each, with + – × ÷ available to you, what is the lowest positive number it is NOT mathematically possible to make? The 7puzzle Challenge The playing board of the 7puzzle game is … Continue reading

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## DAY 151:

Today’s Challenge Solve all four lines arithmetically by replacing the 16 ◯ ‘s below with digits 0-9, but each digit must only be inserted a maximum of TWICE in the whole challenge: ◯ + ◯ = 8 … Continue reading

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## DAY 150:

Today’s Challenge Find the sum of the numbers that remain after eliminating all multiples of 3, 5 and 7 from all odd numbers between 10 and 40. Also, do you notice anything in particular about these remaining numbers? The 7puzzle Challenge The … Continue reading

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## DAY 149:

Today’s Challenge If you added 3+6, then to that answer added 9, then 12 . . . and kept on adding consecutive multiples of 3 to the previous total, what is the first answer you would reach that is more … Continue reading

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## DAY 148:

Today’s Challenge Which is the lowest whole number that is not a multiple of 5, 6, 7, 11 or 13 nor a prime number, square number or cube number? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 … Continue reading

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## DAY 147:

Today’s Challenge Firstly, allocate fifteen letters from the English alphabet the following values: E=3, F=9, G=6, H=1, I=–4, L=0, N=5, O=–7, R=–6, S=–1, T=2, U=8, V=–3, W=7, X=11. You’ll see that O+N+E=1 and T+W+O=2 and so on, but how far is it … Continue reading

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## DAY 146:

Today’s Challenge Apart from 987631 (9+8+7+6+3+1), can you find the other FOUR ways you can make 34 when adding together six UNIQUE digits from 1-9? . The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid of 49 different … Continue reading

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## DAY 145:

Today’s Challenge If the sequence 10, 11, 13, 16, 20 . . . was continued, what would be the first number on the list that is above 200? . The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid … Continue reading

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## DAY 144:

Today’s Challenge Another mini-MATHELONA challenge where you must replace the eight ◯’s below with the eight digits 1, 1, 1, 2, 2, 3, 4 and 5 so both lines work out arithmetically: ◯ + ◯ = 3 = … Continue reading

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## DAY 143:

Today’s Challenge Start with the number 50, then: +27 –42 divide by 5 ×4 +50% two-thirds of this ÷7 = ? What is your … Continue reading

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