"Half your age plus seven" rule?
954649
hehe this is the scenario I'm in...
628270
Can't be...any age divided by 1 wouldn't leave a remainder...if you eliminated '1' from the equation, it would be 61
337884
13, defintly, dude it's half
847535
Let the ages be T and G respectively.\nT^2 = 4G.\n"When T is half as old again..": that means another 0.5T years have passed. So his grandmother is then G+0.5T years old.\nSo we have T^2 = 4G and G + 0.5T = 72. \nDividing the first one by 4 gives G = 0.25T^2, so substitute that into the second on.\nSo 0.25T^2 + 0.5T = 72.\nMultiplying by 4 and rearranging gives T^2 + 2T - 288 = 0, ie (T-16)(T+18) = 2, so Tom must be 16 years old, and his grandmother 64.\nNow, when his grandmother is 72, Tom must be 24.\n\nedit - I'm not sure why you are confused, but I've reworded the above slightly. Note it does *NOT* say 'when Tom is half as old as he is now..', it says 'when Tom is half as old *again*'. Saying half as much again means you add half to the current amount; ie you actually get 1.5 times the current amount.
89230
x is age 5 years ago.  so x = 7.  age now is x + 5 = 12
942599
THE OLDEST ONE IS 12, THE YOUEST 10. SO THE MIDDLE MUST BE 11
925426
one half and seven eightths
535562
7 or 8 (including mexico)
495583
its not twelve..ill think of it..ya i got it..anne is 18 now coz six years ago when mary was 18 anne was 12 which is half of mary's age..
545123
12 to 1  less than 2 .....12 to 5 for number over a 7
797179
7.5 is big and at 16 you have a few more years to go possibly until you are 21.
793283
In australia you have to be 18, but some countries are 17 16 and 15 if its over 17 you have to be 17
554750
here is a little formula I like... your age -7 multiplied by 2. IT tells you the oldest you can date and it will work. (14 -7) x2 = 14.... (13-7) x2 =12 (hence its broken there for 13 is too young to date.)
225927
Usually you have to be 16.
115867
I'm 7. I'm just playing, i'm older. :D
372591
Atleast old enough to spell!!!\nHave not Half!!!\nAnyways, I'm pretty sure its 18+
81274
Different country has different rule. Max-14.\nIf a person is behving good, then it may reduced\nto eight.