1MA0 Higher March 2013 Paper 1 Q8
8 Trams leave Piccadilly
to Eccles every 9 minutes
to Didsbury every 12 minutes
A tram to Eccles and a tram to Didsbury both leave Piccadilly at 9 am.
At what time will a tram to Eccles and a tram to Didsbury next leave Piccadilly at the same time? (3)
| Answer | Mark | Notes |
|---|---|---|
| 09 36 | 3 | M1 for listing 9, 18, 27, 36, 45, ... (at least 3 correct multiples with at most one incorrect) M1 for listing 12, 24, 36, 48, .... (at least 3 correct multiples with at most one incorrect) A1 for 09 36 or 9 36 (am) OR M1 for listing 9.09 9.18 9.27 9.36 ... (at least 3 correct times with at most one incorrect) M1 for listing 9.12 9.24 9.36 ... (at least 3 correct times with at most one incorrect) A1 for 09 36 or 9 36 (am) OR M1 for 9 = 3 × 3 or 12 = 2 × 2 × 3 (could be in factor tree) M1 for 9 = 3 × 3 and 12 = 2 × 2 × 3 (could be in a factor tree) A1 for 09 36 or 9 36 (am) SC B2 for 9 36 pm or (after) 36 (minutes) on the answer line |