Author Archives: 7puzzle

DAY 83:

Today’s Challenge What is the sum of all multiples of 0.5 from 10 to 20 inclusive? . 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 2nd & 3rd rows contain … Continue reading

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WELCOME

A warm welcome to 7puzzleblog.com and our compendium of daily number puzzles which we design and produce for our many followers from over 160 different countries and territories. As this website is home to the 7puzzle company, we are also the … Continue reading

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… AND THERE’S MORE!

As well as the many hundreds of number challenges posted here at 7puzzleblog.com, some of the educational activities the 7puzzle company is currently involved in are: supporting students with one-to-one maths tuition, delivering school-based maths/puzzle workshops, designing board games, card games, puzzles & books for use in our workshops … Continue reading

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DAY 82:

Today’s Challenge Using each of the four numbers 0.8, 0.9, 1.5 and 5 once each, and with the four arithmetical operations + – × ÷ available to use, can you arrive at the target answer of 7? . The 7puzzle Challenge The playing board of the … Continue reading

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DAY 81:

Today’s Challenge Carry out the following 15-step number trail with no calculator!  Start with 20, then: +1    ÷3    ×5    –7    +2    ÷6    +4    –1    ×3    ÷4    +4    –5   … Continue reading

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DAY 80:

Today’s Challenge Each of the nine letters, A-I, in the two sections below has a subtraction calculation attached to it.  Which is the only letter that has the same answer in both sections? Section 1 C:24–13  G:14–6  D:20–10  E:15–7  I:14–9  F:18–11  B:9–2 … Continue reading

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DAY 79:

Today’s Challenge If each letter is assigned a value as follows: A=1 B=2 C=3 . . . Z=26, find a 7-letter word in the English language that has the value of 79 when the values of the seven letters are added together. . … Continue reading

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DAY 78:

Today’s Challenge Using the three numbers 5, 5 and 5 once each, with + – × ÷ available, which seven target numbers from 1-30 are mathematically possible to achieve? . 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 77:

Today’s Challenge The two sections below both contain eight letters, A to H.  Each letter has a calculation attached.  Which letter is the only one to have the SAME answer in BOTH sections? Section 1 E:8×3   B:30÷2   H:15+3 … Continue reading

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DAY 76:

Today’s Challenge It is possible to use seven 4’s (4, 4, 4, 4, 4, 4 and 4) once each, together with the four operations + – × ÷ to make all the different target numbers from 1, 2 and 3. For instance, … Continue reading

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