This is so easy to get right...or wrong...

[derrick]

70

 

[winjim]

BODMAS, people. And check your coefficient of french fries.

The answer's 15.

 

[Andy_R]

Look, I got a D grade at A level maths and I've had a bit of a complex about it for the last 45 years. If I got the answer wrong, could you say I'm good at Woodwork and I that try hard?

ok...you're really good at measuring twice and cutting once....

 

[bonsaibilly]

60! Damn, I even identified the catch before I started, but then completely forgot about it!

 

[bonsaibilly]

BODMAS, people. And check your coefficient of french fries.

The answer's 15.

It isn't anywhere close.

 

[winjim]

It isn't anywhere close.

Show your working then.

Edit: there's a few versions of this floating around facebook, each with the same two tricks. There are also a few versions of a similar one which has about three potential answers and therefore no single correct one.

 

[slowmotion]

ok...you're really good at measuring twice and cutting once....

Oh balls! Some things don't get any better after 45 years.
Just tell them I try hard, OK?

 

[bonsaibilly]

Show your working then.

Balls to it. I don't think I'm right anyway.

On reflection, I'm going for 25

 

[Sharky]

Fooled me - good puzzle.

 

[slowmotion]

Where are the brackets????

(Desperate attempt to avoid The Naughty Step)

 

[toffee]

Well I say 25 as multiplication takes preference over addtion.

 

[swee'pea99]

60. Not 17. That'll teach me to look properly. Or, more likely, it won't...this sort of thing never has before.

 

[Tim Hall]

Where are the brackets????

(Desperate attempt to avoid The Naughty Step)

No brackets, so no B to worry about. No "of" (or "orders") either, so no O. Work with DMAS instead.

 

[Tim Hall]

Well I say 25 as multiplication takes preference over addtion.

I say 15 for the same reason

 

[swee'pea99]

"multiplication takes preference over addition" - what does that mean? (Maybe I'm still wrong.)