Guest Jan 7, 2018

edited by
Guest
Jan 7, 2018

edited by Guest Jan 7, 2018

edited by Guest Jan 7, 2018

#1**+2 **

a) 24F = (130 - 10)

b) By inspection...I see that the right side evaluates to 120....and I know that 24 divides 120 five times.....so...there are 5 friends

By.....systematic trial.....we could plug 1,2,3,4 and 5 in for F and find that 5 would work

The second method is easier, in my opinion, if you don't happen to see that 24 divides 120

CPhill
Jan 7, 2018