Higher November 2019 Paper 4 Q3
3 At a railway station, trains are either eastbound or westbound.
An eastbound train leaves the station every 25 minutes.
A westbound train leaves the station every 45 minutes.
An eastbound train and a westbound train both leave the station at 8 am.
When is the next time that two trains leave the station together? [4]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 11 45 [am] | 4 | SC3 for 11 45 pm OR B2 for LCM as 225 and M1 for their LCM correctly converted to hours and minutes OR M1 for 25 = 5 x 5 and 45 = 3 x 3 x 5 and M1 for [0] 8 00 plus their LCM OR B1 for listing [0] 8:25, [0]8:50, [0]9:15... or 25, 50, 75.. and B1 for listing [0]8:45, [0]9:30, 10:15… or 45, 90, 135.. | condone 11 45 h[ours] or 11 h[ours] 45 m[ins] as answer implied by 3[h] 45 [m] including 1[h] 15[m] for 75 including 1[h] 30[m] and 2[h] 15 [m] |