Foundation June 2023 Paper 1 Q21
21 Trams to the airport leave every 50 minutes.
Trams to the beach leave every 35 minutes.
A tram to the airport and a tram to the beach leave together at 9:30 am.
When is the next time that two of these trams leave together? [4]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 1520 or 3 20 pm | 4 | B3 for 3.20 or 1520 pm or B2 for listing the next 3 correct times of both trams i.e. 10.20, 11.10, 12.[00] and 10.05, 10.40, 11.15 or B1 for listing the next 3 correct times of one tram i.e. 10.20, 11.10, 12.[00] or 10.05, 10.40, 11.15 OR B3 for 5 [h] 50 or B2 for [LCM =] 350 or B1 for listing the next 3 multiples of 50 or 35 i.e, 100, 150, 200 or 70, 105, 140 or 1[h] 40 2[h] 30 3[h]20 or 1[h]10 1[h]45 2[h]20 or M1 for [50 =] \(2 \times 5 \times 5\) and [35 =] \(5 \times 7\) allow in a factor tree or tables etc or [LCM = ] 350\(k\) or \(2 \times 5 \times 5 \times 7\) | Mark only 1 method Condone 0320, 3.20 am 1520am for 3 marks but do not accept 15 h 20 or 3 h 20 Condone 10.5 if followed by 1040 May be indicated by circling in a list must be identified Condone 1 in factor trees |