Thanks to my followers for taking part in my Day 1 Maths problem.

Firstly, **the answer is 5**, using the usual BODMAS / PEDMAS rules of maths.

During one of my first lessons at high school, my maths teacher asked us all to get our calculators out and try out this calculation:

**1 + 2 x 3**

Anyone with a calculator showing 9 had to put their calculators away, and purchase a brand new Casio calculator that followed BODMAS rules. This was at the hefty cost of £15 at the time (ok, it was close on 20 years ago), which I’m sure was worth the money as it showed the ‘correct’ answer of 7.

**BODMAS / PEDMAS**

For those who don’t know or have forgotten, maths follows strict rules of calculation. Known as BODMAS (or PEDMAS in some regions), the order of calculation is:

**B** = Brackets (or Parentheses)

**O** = Orders (or Exponents / powers)

**D** = Division

**M** = Multiplication

**A** = Addition

**S** = Subtraction

Bod was quite a popular childrens program when I was growing up, so this was quite easy to remember – the cartoons are all on youtube! Using these rules our original calculation needs to be done as follows:

B: None here

O: None here

D: 4 ÷ 2 = 2

M: 2 x 2 = 4

A: 3 + 2 x 2 = 3 + 4 = 7

S: 3 + 2 x 2 – 4 ÷ 2 = 3 + 4 – 2 = 7 – 2 = 5

Brackets are used to clarify or indeed change the order of calculation, so:

(3 + 2) x 2 – (4 ÷ 2) = 5 x 2 – 2 = 8

For those who want a further challenge –

**How many different answers can you get by adding brackets to the original calculation but keeping the order of numbers / operators the same?**

I have shown you two –

3 + 2 x 2 – 4 ÷ 2 = 5

(3 + 2) x 2 – (4 ÷ 2) = 8

Don’t you just love maths!