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

#1**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