Find the following values without a calculator.
For 9 and 11,
- what is the first common multiple?
- what is the second common multiple?
- what is the fourth common multiple?
(a)
Multiples of 9: 9, 18, 27, 36, 45
Multiples of 11: 11, 22, 33, 44
First common multiple = 99
(a)
99 x 2 = 198
Second common multiple = 198
(a)
99 x 4 = 396
Fourth common multiple = 396
Answer(s): (a) 99; (b) 198; (c) 396