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 ~
In our life , there surely some resource are available for us but they are limited, such as time and space. Recently I got enrolled to a computer science program
My boss have been asking this question quite few time : “What will you do when you bump into a Big..BiG..BIG hole ?” and the answer would … as it
Saya telah dilabelkan sebagai panas baran untuk sekian lama. Biasanya keluarga terdekat atau lingkungan paling dekat “inner circle” telah masak dengan perkara ini. Terdapat banyak perkara yang boleh mencetuskan kemarahan
to get 10
10 is 4 + 4 + (4/4) + (4/4)
hehehe..
Eleven is
11 = 4 + 4 + 4 – (4/4)
both above invalid. as there is a rules..
4 cannot be used more than 4 times..
(44/4) – (4/4) also cannot..
revising..
10 = (4 – (4/4))! + 4
Must solve in sequence? Here is some easy ones …
16 = 4+4+4+4
20 = (4!-4)*4/4
24 = 44-4!+4
28 = 44-4*4
32 = (4^2)
36 = 44-4-4
40 = 4!+4!-4-4
43 = 44-4/4
44 = 44*4/4
45 = 44+4/4
48 = (4+4+4)*4
52 = 44+4+4
56 = 4!+4!+4+4
60 = 44+4*4
64 = 4^2+4^2+4^2+4^2
68 = 4*4+4*4
88 = 44+44
96 = (4!*4)*4/4
95 = (4!*4)-4/4
97 = (4!*4)+4/4
eleven..
11 = 4^2 – (4/4) – 4
12 = 4^2 – 4 * 4/4
13 = 4^2 – 4 + (4/4)
14 = 4^2-(4+4)/4
18 = 4^2+(4+4)/4
15 = 4*4-(4/4)
17 = 4*4+(4/4)
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