Help please

[willow_catkin]

We have been looking at number questions and have managed to work out some complex ones, but one has me stumped; it is

6 [12] 18 7 [19] 12

8 [ ] 12

The answer is 10 which I can see from the first (add them togetehr and halve) but cannot get the second to tie in - help please?

[Tailsmo]

The first sequence is add together and halve 6+18=24/2=12

The second sequence is add together 7+12 = 19

The third sequence is add half together 8/2+12/2=10

Hope this helps!

[hasmum]

Hi,
All 3 have to be worked out the same way, I am also puzzled with the 2nd one, have had a go.
I tried 6(12)18 6x2+18=30
minus 1st no. 6 then divide by 2=12

It works for 1st and 3rd not 2nd one.

Are the numbers correct for 2nd one?
Im sure Sally Anne or patricia will soon come along, sorry.

[999 mum]

An explanation was not found last time!

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

(I must stop remembering the questions )

[Tailsmo]

New to these particular types of problem (the 9/10 age Bond books we are doing haven't got these in yet). Is my earlier explanation not right?

[hermanmunster]

I think the instructions for the question were that you had to do the same thing to the first 2 and then apply it to the third - trouble was there didn't seem to be anything that could be done to the first 2 that would bring up the answers given (in base 10 anyway ).

The first one and the "unknown one" with answer 10 - could easily have been W"add the two and halve the answer - hence the reason why the second one doesn't look right. .... seems we have tried this none before!

[xyzzy]

It looks like an error, given that 7 + 12 = 19. For some reason, they forgot to halve it in the second case, and chose numbers which aren't divisible by two without a remainder, as well.