Demon Type K question

[Marylou]

I'm the first to admit that maths isn't my strong point, but...either there's a mistake in this question or I'm losing it!

(6 [12] 18) (7 [19] 12)

(8 [___] 12)

The answer is supposed to be 10. Which you would get by adding the numbers together and dividing by 2 - this works for the first pair. But it doesn't work for the second pair!

Any ideas welcome!

[999 mum]

Hi,

I asked this question a few months ago.

http://www.elevenplusexams.co.uk/forum/ ... =3&t=16177" onclick="window.open(this.href);return false;

I thought I was going potty and missing something obvious - but it was nice to know that it wasn't only me.

[no_ball]

Maybe it's one of those typo ones we come across now and then

[Marylou]

Thanks for replies and for the link - nice to have confirmation that I have a few marbles left!

If you change the number(s) in the second set so that they add up to 38 (e.g. 7 and 31) then the sum works.

This is the second mistake we've spotted in one day - earlier we found an error in a Type N from the same source!