Find the following values without a calculator.
For 4 and 12,
- what is the first common multiple?
- what is the second common multiple?
- what is the fourth common multiple?
(a)
Multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48
Multiples of 12: 12, 24, 36, 48
First common multiple = 12
(a)
12 x 2 = 24
Second common multiple = 24
(a)
12 x 4 = 48
Fourth common multiple = 48
Answer(s): (a) 12; (b) 24; (c) 48