Level 2
Adam builds a toy car in 3 hours.
Adam and Bryan builds a toy car in 5 hours.
If Bryan builds a toy car by himself, how long will he take?
(Give the answer in fraction. Eg 1 13 h)
Level 3
Adam builds a toy car in 3 hours.
Bryan builds a toy car in 6 hours.
Chris builds a toy car in 5 hours.
If they work together,
how long does it take to build a toy car?
(Give the answer in fraction. Eg 1 13 h)
Level 3
Adam and Bryan builds a toy car in 4 hours.
Bryan and Chris builds a toy car in 6 hours.
Chris and Adam builds a toy car in 3 hours.
How long does it take for Adam, Bryan and Chris to build a toy car together?