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 8 and 14
- LCM of 16 and 20
- LCM of 3, 6 and 7
(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 8: 8, 16, 24, 32, 40, 48, 56
Multiples of 14: 14, 28, 42, 56
LCM of 8 and 14 =
56 (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, 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): 21, 56, 80, 42