Just towards the end of the war, when I go to Mass totally accidentally because I met a fella in the pub.

In those days, they had Children's rooms because people worked round the clock.

Andi took all, went out with the kids to the pub to relax.

Chap came up to me.

I live in Bristol, So we sit here.

I was your mass, then made me dad.

I said, All right.

That I was your multiplication.

No, really, is it?

Shall I show you how the Russians do what we can if you like, is it?

Come here.

Come here.

Is it?

Say you want a much Blake?

Nine times 30 is that you're right.

And so beat like that on what they do.

They arms and doubles everything.

So what we're going to do is off nine.

So give me an often Orin.

I said that's four and 1/2.

Is it four and 1/2 going on?

He said the Russians had purges things they don't like One thing they don't like infractions.

They ate some so a scrub That out, Call it for after nine is for after for his tooth after two is one as one site Now what you do, they said, is you double the other side.

So to 13 I'll do it.

You tell me this, right?

26 2 of those 52 on two of those 104.

And now we got four.

Excite.

Now there's another purge.

The Russians had one thing they really couldn't stand.

Worst infractions.

They couldn't stand even numbers on the left inside.

They could know Ito.

But let's have a look or that's odd, but that's even.

So.

How goes the whole row gone?

That's even.

I got a whole row.

That's odd.

So what you got left you as up 13 of four is 17 plus 100 on, Would you believe nine times 13 equals 117 on that works with any numbers every single time.

I want to see you again, Johnny.

I want to see another example.

So you do another one.

I'll give it with your head the other way around.

It doesn't matter.

What number do you?

Would you?

13 times nine on for 13 6 and 1/2 to get the iron for 63 for 31 and 1/2.

Forget the huh?

Two nines 18 to 8 genes 36 to 36 is 72 we got 40 side.

But there's an even one here on the left inside.

So that line goes out.

And now when you add them up 117 and 13 times nineties also 117.

Triple figure quadruple any figures you like.

I tried to trace this back on.

I found it credible because people in your gruel areas before schools in Victorian times are long before that used to use it.

In Elizabethan times.

We know they used it, this system of doubling and halving, but I traced it back even further.

I taste it back to about four and 1/2 1000 years ago in Egypt, and they did it a slightly different way.

So let's say you want a bolt by nine times 13 again.

What they would do is write the 13 down on here.

They drive a one double it to double four double E eight.

Double it 16 stop.

We don't need 16 will any multiplying by nine.

We got enough to 13 26 2 of those, 50 to 2 of those 104.

Okay, they were told.

There's only won't make him a nine from these numbers on the left hand side.

And sure enough, it's eight and one makes nine.

So out goes that one.

And that was that one on 13 4 1700 you got the same answer.

Nine times 13 equals 117.

That was the Egyptian method.

Now can we link this very old mathematics to the present day?

Yes, we can.

Let's do this one.

Lets score the ones we use with one on the ones we didn't use for the North.

Reading up on what you would get is one no, no.

One, no one, nor nor one is the finery number for nine wise the buyer number because it's made up of an eight on the one buying the numbers.

Work like this one, 24 one is that too?

It's one of those, and none of those three is one of four is one of those on.

None of the five is one of those on one of those four and a one, and so on.

And here eight and one is nine.

And that's the binary number for nine.

The finally number for 10 would be one zero 10 Okay, And that would give you eight.

And two is 10 in.

Sure enough.

10 times 13.

26 um, 104 is 130.

So a ll These ancient mass is linked to the very maths that makes our computers work.

Televisions, work, our satellites and everything else.

Digital information is what makes the world go around today.

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You take.

You want the binding number for any number.

Give me a number to find the buyer number 2029 right, 29 ready to buy?

Remember, half of that is 14 and 1/2.

Forget the her.

I have a 14 inch 7/2 of 73 on our heart.

Forget the heart.

Half of three is one and 1/2.

Forget the half right on the Byron.

Number 29 is 111 No, that one, because it's even one 111 north one.

So if you want to find the bony number off any number, you write it down.

Reduce it by heart for getting the fractions, not score the numbers one or zero.

Going up on that will be the bind.