Express 31 by 4 successive digits, using no more than 4 out of 5 basic operations (i.e. + - / * and exponentation), nothing else allowed.
No brackets!
The order of the digits must be an arithmetic progression like 8*7-6-5 or 3+4*5+6, examples fitting the specifications but not the result.
(In reply to
re: Spoilers and expansion by xdog)
Part a: 8-7+6*5............nice
Part c: 17*15-16*14...........you are supposed to use 4 digits,
not numbers
Edited on August 16, 2018, 1:26 am