PSLEFind the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- LCM of 7 and 8
- LCM of 5 and 15
- LCM of 15 and 18
- LCM of 4, 5 and 6
(a)
Multiples of 7: 7, 14, 21, 28, 35, 42, 49, 56
Multiples of 8: 8, 16, 24, 32, 40, 48, 56
LCM of 7 and 8 =
56 (b)
Multiples of 5: 5, 10, 15
Multiples of 15: 15
LCM of 5 and 15 =
15 (c)
Multiples of 15: 15, 30, 45, 60, 75, 90
Multiples of 18: 18, 36, 54, 72, 90
LCM of 15 and 18 =
90 (d)
Multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60
Multiples of 5: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60
Multiples of 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60
LCM of 4, 5 and 6 =
60 Answer(s): 56, 15, 90, 60