Today’s Challenge
This is a continuation of a number puzzle, posted on DAY 10, made famous by French writer George Perec.
In that challenge, we asked you to use seven 7’s (7, 7, 7, 7, 7, 7 and 7) once each, with + – × and ÷ available, to make target numbers from 1 to 3.
To carry on the pattern, and make 4, you could simply do:
- 7 – [(7÷7) + (7÷7) + (7÷7)] = 4
We now invite you to make all the target numbers from 5 through to 9.
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 1st & 6th rows contain the following fourteen numbers:
2 5 9 12 14 15 18 20 22 33 40 49 56 72
What is the sum of the multiples of 8?
Make 180 Challenge
Can you arrive at 180 by inserting 4, 6, 8 and 10 into the gaps below?
(◯+◯)×(◯+◯) = 180
Answers can be found here.
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