Author Archives: 7puzzle

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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DAY 142:

Today’s Challenge From the numbers 1-20, eliminate all: square numbers prime numbers triangular numbers multiples of 6 When adding together the numbers that remain, what is your total? . The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid containing … Continue reading

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DAY 141:

Today’s Challenge One of our easier MATHELONA-style challenges, but still utilising the four arithmetic operations.  Replace the ◯’s with the digits 1, 2, 2, 3, 4, 4, 5 and 6 so both lines work out: ◯  +  ◯   =    6   … 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 on a daily basis here at 7puzzleblog.com, some of the educational activities the 7puzzle company is currently involved in during 2017 are shown below. You can gather further details of … Continue reading

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DAY 140:

Today’s Challenge If you added 1+2, then to that answer added 3, then 4, followed by 5, and so on, what is the first answer you would reach that is more than 200? . The 7puzzle Challenge The playing board … Continue reading

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DAY 139:

Today’s Challenge There are two sections below, both containing ten letters, A-J.  Each letter is linked to a division calculation: Section 1 D:9÷3  H:8÷2  B:12÷3  I:8÷4  A:4÷2  E:24÷6  G:15÷5  C:20÷4  F:25÷5  J:7÷7 Section 2 I:6÷2  G:6÷3  D:10÷2  E:12÷4  J:14÷7  B:20÷5  A:18÷6  C:10÷5 … Continue reading

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DAY 138:

Today’s Challenge The two sections below both contain ten letters, A-J, each of which has a multiplication calculation assigned to it: Section 1 C:10×2  J:4×3  F:8×5  D:3×3  I:3×2  G:7×4  B:5×4  H:9×4  E:10×3  A:6×4 Section 2 B:12×2  D:6×1  G:8×3  J:5×2  E:6×5 … Continue reading

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DAY 137:

Today’s Challenge It is possible to use seven 5’s (5, 5, 5, 5, 5, 5 and 5) once each, with the four operations + – × ÷, to make all the target numbers from 1 to 5. For instance, to arrive … Continue reading

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DAY 136:

Today’s Challenge Can you arrive at the target number 55 by using the five numbers 1, 2, 3, 4 and 5 exactly once each, and with + – ×  ÷ available? . The 7puzzle Challenge The playing board of the 7puzzle … Continue reading

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