There is a (somewhat well known) problem that I give my year 7's to work on for whole numbers called '4 fours'. The problem is to create expressions that equal the numbers 1-100 using exactly four occurances of the number 4 and a group of common operations. Eg. 0 = 4 + 4 - 4 - 4, 1 = 44/44, ....
Looking up some solutions today I found
this guy who
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