Mathematics question.

[86JR]

This is purely Maths, not IT (bits/bytes).

What is 32*32?

The way I do this in my head is 30*30 = 900, and 2*2 = 4. Therefore answer is 904.

However the answer is actually 1024.

This confuses me entirely. I thought I was good at Mathematics.

 

[86JR]

Damn, this is looking like one of those threads isn't it?

But hey the last time I was at school was in 2001 Maths related.

No wonder I struggled at Bsc Comp Sci Maths!

 

[86JR]

So in Hex, 0 = 3? I thought HEX = 6? 6x400 = 2400?

 

[86JR]

Think of it this way


(A + B) * (A + B) = A^2 + 2AB + B^2

Therefore

32 * 32 =(30 + 2) *(30 + 2)= 30^2 + 2( 30*2) + 2^2 = 900 + 120 + 4 = 1024

Simples!

You missed out the 2AB!

(There are no Dumb questions, Only Dumb answers!)

How do you do all that in your head?

 

[86JR]

I kind of see where you are coming from, but the math does not work like that.

For example in simple person talks.

32*32 is basically 32 32s.

So 32... 32 times...

By splitting it up into two sums, 30*30 is having 30 lots of 30, and 2*2 is having 2 lots of 2... So it will be less than adding both sums together.

Okay I suck at explaining, but this makes sense in my head.

That's a far more logical explanation to me than the others here