+0  
 
0
109
5
avatar+15 

a friend an i were talking abou tthe famous four 4s puzzle.  he mentioned doing it with 10 instead. got them all except for 4 and 7. so, how?

 

i know the rest such as 1 = 10+10/10+10, and 3 = (10+10+10)/10 or 5 = (10*10)/(10+10)

 

can use any pemdas function, but no other numbers.

janets69  Jan 15, 2018
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5+0 Answers

 #1
avatar+6928 
0

log 10 + log 10 + log 10 + log 10 = 4, and 10 - log 10 - log 10 - log 10 = 7 perhaps?

:P

log is a function, not a number.

MaxWong  Jan 15, 2018
 #2
avatar+15 
0

cant use log. much more basic.

janets69  Jan 15, 2018
 #3
avatar+430 
0

how about (10+10)/(10-10) = 20/0

 

 

OH SHOOT I MIGHT END THE WOR-

OfficialBubbleTanks  Jan 15, 2018
 #4
avatar+15 
0

Bump?

janets69  Jan 15, 2018
 #5
avatar+82937 
+1

7  =    

 

10  -  √  [  10  -  10/10 ]  =

 

10  -  √ [ 10  -  1  ]  =

 

10  - √9  =

 

10  -  3  =

 

 

7

 

 

cool cool cool

CPhill  Jan 16, 2018

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