PSLE Answer the following.
- What is the first common multiple of 4 and 5?
- List all the common factors of 22 and 36. Give your answers in numbers in ascending order. (Eg $(n1), $(n2), 4)
(a)
Multiples of 4: 4, 8, 12, 16, 20
Multiples of 5: 5, 10, 15, 20
First common multiple: 20
(b)
Factors of 22: 1, 2, 11, 22
Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36
Common factors of 22 and 36: 1, 2
Answer(s): (a) 20; (b) 1, 2