PSLEFind the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- LCM of 4 and 5
- LCM of 6 and 12
- LCM of 15 and 20
- LCM of 3, 6 and 7
(a)
Multiples of 4: 4, 8, 12, 16, 20
Multiples of 5: 5, 10, 15, 20
LCM of 4 and 5 =
20 (b)
Multiples of 6: 6, 12
Multiples of 12: 12
LCM of 6 and 12 =
12 (c)
Multiples of 15: 15, 30, 45, 60
Multiples of 20: 20, 40, 60
LCM of 15 and 20 =
60 (d)
Multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42
Multiples of 6: 6, 12, 18, 24, 30, 36, 42
Multiples of 7: 7, 14, 21, 28, 35, 42
LCM of 3, 6 and 7 =
42 Answer(s): 20, 12, 60, 42