Answers:
There are 7 services, A - G. At a certain place along the routes of
each svc,
A (2) will meet B (4) (Upp Changi
Road)
B will meet C (8) (Tampines Int)
D (16) will meet E (32) (Bedok
Int)
E will meet F (64) (Redhill MRT)
F will meet G (128) (Dhoby Ghaut MRT)
C will not meet D however.
A x 2 = B, B x 2 = C, C x 2 = D and so on.
There are another 5 services, I - M. At a certain
place along the routes of each svc,
I (3) will meet J (6) (Pasir Ris
Int)
J will meet K (12) (Pasir Ris Int)
K will meet L (24) (Expo)
L will meet M (48) (Tanah Merah MRT)
I x 2 = J, J x 2 = K and so on.
There may be more than
one point of intersection between two services. Stated above is one
of them, if applicable.
No one managed to answer the question, though 2615P managed to
partially answer it.
Thanks for attempting, will post questions soon!