b + b = b
divide both sides by b

What single number satisfies this?

What happens when you divide by this number?

You can't divide by (a-b) if a=b

That' the trick Wahl Icht. Zero divide. But it gets lost in the algebra.
Well spotted. Got to the top of the class! If it ever restarts.

comment by Admin1 (U1)
posted 27 minutes ago
b + b = b
divide both sides by b

What single number satisfies this?

What happens when you divide by this number?
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Zero I'd say

2 plus 2 is 4, minus 1, that’s 3

Quick maths

Magic number
142857
if you multiply this number by 2, 3, 4, 5 or 6 the digits still appear in the same order although not in the same position in the result.
Multiply it by 7 gives 999999 which is how to remember the original number if you forget.
Just entering into the spirit of home-schooling here.

Did you know that in a room of just 23 people, there’s a 50% chance that at least two people will have the same birthday?

#randommaths

Why did the two fours not have dinner?

Because they already 8.

A room of 23 people contravenes current distancing rules. It would haxe to be a large hall at least.

Factorials are fun. They're signified with an exclamation mark.

3! = 1 x 2 x 3 = 6.
7! = 1 x 2 x 3 x 4 x 5 x 6 x 7 = 5040
14 = 1 x 2... = 87178291200

Knowing this, what is the value you get from "0!"?

...and you'd have to seriously consider if their gathering was absolutely necessary.

Same as I give people who are looking for sympathy... absolutely nothing.

comment by goadocwatson (U1016)
posted 8 minutes ago
Same as I give people who are looking for sympathy... absolutely nothing.
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Actually, in this context you'd be "giving them one". Ooh-err missus.

0! = 1.

Also anything to the power of 0 is 1. Even 0. And even imaginary numbers!

It makes perfect sense when you dig deeper, but on a surface level it just looks stupid.