Here's A Nice Maths Oddity......

[ToraToraTora]

196-182x0.5=7!!

Is that correct?

[ichkeria]

105 I think

[elliemay1]

No it must have brackets:

(196-182) x 0.5=7

[Electrochem]

105

 

[elliemay1]

Yes, it would be 105, multiplication takes precedence

[calmck]

I get 105

[newmodarmy]

It's 105.

Is that 7 factorial (ie 5040) followed by an exclamation mark or 7 factorial  factorial - which would be whater 5040! is?

 

[newmodarmy]

Go on, tell us why you're asking

[ToraToraTora]

105 is correct so is 7!!

[elliemay1]

How can both be correct?

[ToraToraTora]

7!!=105 (!!= double factorial)

7!! is not (7!)!

its 7 x 5 x 3 x 1 = 105

 

[-SharonA-]

I make it 106

[elliemay1]

I didn't know that you meant double factorial, I thought you were expressing great surprise!!

[ToraToraTora]

15:31 how have you arrived at 106?

[ToraToraTora]

15:34 yes it was meant to be slightly mischievious! When I first saw it I thought it's 105 not 7 and assumed the 7 was arrived at by (196-182)x0.5 and therefor wrong. That's what threw me. So when you realise that the !! is not merely punctuation then you can see that it is in fact the correct answer of 105 expressed as a double factorial.

[ichkeria]

Very nice 

[elliemay1]

Very good!

[Prudie]

How intersesting. I have a maths degree and yet I have never heard of a double factorial before.

[newmodarmy]

I should get a best answer for being the first to spot the factorial aspect (!!)

[ToraToraTora]

Prudie, ever heard of Tetration?

https://thinkzone.wlonk.com/MathFun/BigNum.htm

scroll down

[Prudie]

Probably, I just read it as an exclamation and assumed this was going to be a BODMAS (or your preferred mnemonic) type question.