Thanks, barmy.
I'm still astounded that anyone could possibly expect a six year old to get to grips with this problem......
Counting out the coins into piles then moving them around to comply with the rules, which is presumably the only way they could attack it ,would take ages and really seems of doubtful value in terms of number learning.
No wonder kids are turned off maths if they are set homework like this which is far too difficult or far too time-consuming for them. Have teachers not heard of positive re-inforcement !
End of rant.