Numbers - LCM (Lowest Common Multiple) and HCF - (Highest Common Factor)
These terms are not actually that hard to understand
Just learn these simple facts:
The Lowest Common Multiple (LCM)
is the SMALLEST number that will DIVIDE BY ALL the numbers in question.
E.g.
3, 6, 9, 12, 15 are all multiples of 3. 5, 10, 15, 20, 25
are all multiples of 5.
The lowest number that is in both lists is 15,
so 15 is the LCM of 3 and 5.
The Highest Common Factor
(HCF) is the BIGGEST number
that will DIVIDE INTO ALL the numbers in question.
E.g.
1, 2, 4, 8 are all factors of 8.
1, 2, 3, 4, 6, 12 are all factors of 12.
The highest number that is in both lists is 4,
so 4 is the HCF of 8 and 12.
I tell you what, it's a lot easier to find
the LCM or HCF once you've listed the
multiples or factors.
If you miss this out it'll
all go horribly wrong!
40, 60
No such question type as Set qData['type'] to valid type. Eg "input" , "select" or "textarea" ...
X
10, 40, 60
No such question type as Set qData['type'] to valid type. Eg "input" , "select" or "textarea" ...
X
10, 24, 40, 60
No such question type as Set qData['type'] to valid type. Eg "input" , "select" or "textarea" ...
X
15, 45
No such question type as Set qData['type'] to valid type. Eg "input" , "select" or "textarea" ...
X
15, 30, 45
No such question type as Set qData['type'] to valid type. Eg "input" , "select" or "textarea" ...
X
15, 20, 30, 45
No such question type as Set qData['type'] to valid type. Eg "input" , "select" or "textarea" ...
X
32, 64
No such question type as Set qData['type'] to valid type. Eg "input" , "select" or "textarea" ...
X
32, 48, 64
No such question type as Set qData['type'] to valid type. Eg "input" , "select" or "textarea" ...
X
16, 32, 48, 64
No such question type as Set qData['type'] to valid type. Eg "input" , "select" or "textarea" ...
X
Laura, Rita and Alan regularly go swimming.
Laura goes every 2 days,
Rita goes every 3 days and Alan goes every 5 days.
They all went swimming together on Friday 1st June.
This is just an LCM
type question. Can you see why?
On what date will Laura and Rita
next go swimming together?
No such question type as Set qData['type'] to valid type. Eg "input" , "select" or "textarea" ...
X
On what date will Rita and Alan next go
swimming together?
No such question type as Set qData['type'] to valid type. Eg "input" , "select" or "textarea" ...
X
On what day of the week will all
3 next go swimming together?
No such question type as Set qData['type'] to valid type. Eg "input" , "select" or "textarea" ...
X
Which of the 3 (if any)
will go swimming on 15th June?
No such question type as Set qData['type'] to valid type. Eg "input" , "select" or "textarea" ...
X