Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
For 2 and 5,
- First common multiple
- Lowest common multiple
- Third common multiple
- Highest common factor
(a)
Multiples of 2: 2, 4, 6, 8, 10, 12, 14, 16, ...
Multiples of 5: 5, 10, 15, 20, 25, 30, 35, 40, ...
First common multiple = 10
(b)
Lowest common multiple = 10
(c)
Third common multiple
= 3 x 10
= 30
(d)
Factors of 2: 1, 2
Factors of 5: 1, 5
Highest common factor = 1
Answer(s): 10, 10, 30, 1