PSLE Answer the following.
- What is the first common multiple of 3 and 4?
- List all the common factors of 40 and 54. Give your answers in numbers in ascending order. (Eg $(n1), $(n2), 3)
(a)
Multiples of 3: 3, 6, 9, 12
Multiples of 4: 4, 8, 12
First common multiple: 12
(b)
Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40
Factors of 54: 1, 2, 3, 6, 9, 18, 27, 54
Common factors of 40 and 54: 1, 2
Answer(s): (a) 12; (b) 1, 2