Here’s a brain teaser !.
Can you “build” all the whole numbers between 1 and 100 using only
four 4’s ?
4
and symbol ..
+ - x / ( ) . x^2 =
oh.. and also factorial..
!
i can get the number 9 as 4+4 + 4/4 ,
hehe.
post your calculated in comment.. let’s see if can get up to 100.
Source : Great-International-Math-Keys-Book
p/s : it is from 1970’s ~
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27 = (44/4) + 4^2
19 = 4^2 + 4 - (4/4)
21 = 4^2 + 4 + (4/4)
22 = 4! - (4+4)/4
26 = 4! + (4+4)/4
49 = 4! + 4! + 4/4
47 = 4! + 4! - 4/4
54 = 4! + 4! + 4! /4
72 = 4^2 * 4 + 4 + 4
76 = 4!+4!+4!+4
80 = 4^2 + 4! + 4! + 4^2
23 = 4! - ((4^2) /(4*4))
25 = 4! + ((4^2) /(4*4))
29 = 4! + 4+ (4/4)
[4!+(4/4)]*4
so easy i break this puzzle in10sec
hope you see because i'm new