blind_assassin wrote...
juun wrote...
blind_assassin wrote...
If you take two years from my sister and add those years to my age I'm twice her age. If you take one more year from her and give it to me I'll be three times her age. How old is my sister and how old am I?
your sister's 3 years old
you are 5 years old
am i right? o_O
btw i'm 21 and obviously need to take more calculus classes to defeat these complex problems
p.s. grats on 1000th post!
Nope. It doesn't require calculus or anything and there's only one correct answer.
Thanks for the grats. I didn't even notice.
I don't quite understand..
if x is your age and y is your sister's
"take two years from my sister and add those years to my age I'm twice her age."
would be
(y-2)+x = 2y
"If you take one more year from her and give it to me I'll be three times her age."
would mean..
(2y-1)+x=3y
right?
btw i did differently to get 3 and 5 years..
i'm a lil confused with 'i'm twice/three times her age' and 'one more year'