PSLE Answer the following.
- What is the first common multiple of 3 and 5?
- List all the common factors of 10 and 50. Give your answers in numbers in ascending order. (Eg $(n1), $(n2), 3)
(a)
Multiples of 3: 3, 6, 9, 12, 15
Multiples of 5: 5, 10, 15
First common multiple: 15
(b)
Factors of 10: 1, 2, 5, 10
Factors of 50: 1, 2, 5, 10, 25, 50
Common factors of 10 and 50: 1, 2, 5, 10
Answer(s): (a) 15; (b) 1, 2, 5, 10