PSLEFind the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- LCM of 3 and 7
- LCM of 9 and 12
- LCM of 16 and 20
- LCM of 3, 5 and 6
(a)
Multiples of 3: 3, 6, 9, 12, 15, 18, 21
Multiples of 7: 7, 14, 21
LCM of 3 and 7 =
21 (b)
Multiples of 9: 9, 18, 27, 36
Multiples of 12: 12, 24, 36
LCM of 9 and 12 =
36 (c)
Multiples of 16: 16, 32, 48, 64, 80
Multiples of 20: 20, 40, 60, 80
LCM of 16 and 20 =
80 (d)
Multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30
Multiples of 5: 5, 10, 15, 20, 25, 30
Multiples of 6: 6, 12, 18, 24, 30
LCM of 3, 5 and 6 =
30 Answer(s): 21, 36, 80, 30