Number

If you know your tables and number bonds,
this is quite basic!
Make sure you know **exactly **
what a Prime number is.
( For example: How many prime numbers
are there on the the six faces of a dice? )

The prime factorisation of a certain number is 3^{2} x 5 x
11.

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.

Converting decimals to percentages is pretty easy really,
so don't worry too much about this.
Just put it as something over a hundred and cancel it down.

Decimals are just another way of writing fractions
â€”so it's easy to convert between the two...
0.36 = 36/100 = 18/50 = 9/25

Answer the following questions without using a calculator.

The trick here is picking out
the important bits from the sentences
and translating them into numbers.
It takes practice.

You can use your calculator for these.
Not so difficult but practice being accurate,
try to avoid losing marks through making silly
mistakes in the exam.

I don't want to spoil the surprise,
but you're going to need your calculator for this bit â€”
get your finger on that fraction button...
RATIOS are like FRACTIONS which are like DECIMALS
We can treat the RATIO 3:4 like the FRACTION 3/4,
which is 0.75 as a DECIMAL.1
Watch out though â€” this isn't 3/4 of the total:
If there are girls and boys in the ratio 3:4,
it means there's 3/4 as many girls as boys.
So if there's 8 boys, there's 3/4 x 8 = 6 girls.

Prepare this work from the scanned page image.
If you are waiting to do this page, ask your teacher to
prepare the gapp fill exercise for you to do.

Prepare this work from the scanned page image.
If you are waiting to do this page, ask your teacher to
prepare the gapp fill exercise for you to do.

Prepare this work from the scanned page image.
If you are waiting to do this page, ask your teacher to
prepare the gapp fill exercise for you to do.

Algebra is not all hard.
It starts off quite easy. A bit like
finding the missing number.

** 4x = 20 , so x = ? **

Algebra is like ordinary arithmetic, but with a letter for a missing number to find.

Algebra is like ordinary arithmetic, but with a letter for a missing number to find.

Simplify these algebraic expressions containing powers.

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