PSLE Answer the following.
- What is the first common multiple of 5 and 9?
- List all the common factors of 34 and 66. Give your answers in numbers in ascending order. (Eg $(n1), $(n2), 5)
(a)
Multiples of 5: 5, 10, 15, 20, 25, 30, 35, 40, 45
Multiples of 9: 9, 18, 27, 36, 45
First common multiple: 45
(b)
Factors of 34: 1, 2, 17, 34
Factors of 66: 1, 2, 3, 6, 11, 22, 33, 66
Common factors of 34 and 66: 1, 2
Answer(s): (a) 45; (b) 1, 2