PSLEFind the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- LCM of 4 and 7
- LCM of 5 and 15
- LCM of 12 and 14
- LCM of 2, 3 and 7
(a)
Multiples of 4: 4, 8, 12, 16, 20, 24, 28
Multiples of 7: 7, 14, 21, 28
LCM of 4 and 7 =
28 (b)
Multiples of 5: 5, 10, 15
Multiples of 15: 15
LCM of 5 and 15 =
15 (c)
Multiples of 12: 12, 24, 36, 48, 60, 72, 84
Multiples of 14: 14, 28, 42, 56, 70, 84
LCM of 12 and 14 =
84 (d)
Multiples of 2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42
Multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42
Multiples of 7: 7, 14, 21, 28, 35, 42
LCM of 2, 3 and 7 =
42 Answer(s): 28, 15, 84, 42