math_kp and Sherlock H did a wonderful job on the last riddle. See to yourself about this one.....mu hahahahaha!
A Old Man Once Said To Me:
"My grandson is about as many days as my son is weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years?"
Since I am Stupid, I need help.
(this is really easy once you think about it)
2006-10-02 17:44:40 · 3 answers · asked by Frontier's 2 in Science & Mathematics ➔ Mathematics
gs*7=s
gs*12=m
if
gs+s+m=120
gs+7*gs+12*gs=120
gs=120/20=6
s=(120/20)*7=42
m=(120/20)*12=72 years
2006-10-02 18:00:57 · answer #1 · answered by sanjeewa 4 · 1⤊ 0⤋
You are 72 years old.
Baby is 72 months or 6 years old.
Your son must be 7 times as old as the baby since he is the same number of weeks as the baby is days.
So the son is 42.
72+42+6=120
2006-10-02 23:17:01 · answer #2 · answered by True Blue 6 · 0⤊ 0⤋
Convert all ages immediately as fraction of Grandpa's (G) age
G+G/12+7G/12=120
So G=12*120/20=72
This is a shorter/ faster answer than the 1st answer :)
2006-10-02 19:00:39 · answer #3 · answered by TheErrandBoy 2 · 0⤊ 0⤋