Higher June 2025 Paper 1R Q1
1 Find the lowest common multiple (LCM) of 45 and 70
(2)
| Scheme | Marks | ||||||
|---|---|---|---|---|---|---|---|
| 45, 90, 135, 180... and 70, 140, 210, 280... or 2, 5, 7 and 3, 3, 5 or  or
| M1 | ||||||
| Correct answer scores full marks (unless from obvious incorrect working) Answer: 630 | A1 | ||||||
| (2) | |||||||
| (2 marks) |
Notes
M1: for any correct valid method eg
for starting to list at least four multiples of each number
or 2, 5, 7 and 3, 3, 5 seen (may be in a factor tree, ignore 1)
or a fully correct Venn diagram
or 5, 9, 14 oe (could be in a table)
A1: Allow \(2 \times 3^2 \times 5 \times 7\) oe
eg \(5 \times 9 \times 14\)