Use the 'double-3 down' dominoes to make a square so that each side has eight dots.
Use these four dominoes to make a square that has the same number of dots on each side.
There were chews for 2p, mini eggs for 3p, Chocko bars for 5p and
lollypops for 7p in the sweet shop. What could each of the children
buy with their money?
We received this solution from someone who
didn't give their name:
Lachlan is $3$
David is $7$
C is $12$
I first looked at the ones with Cassandra in and found the
difference, which was $4$, so that means David and Lachlan's ages
have a difference of $4$. I then worked out that $7$ and $3$ have a
difference of $4$ and make $10$. So, either David is $7$ and
Lachlan is $3$ or the other way round.
When I took $7$ from $19$ to get Cassandra's age, that made $12$
and it also made $12$ if I took $3$ from $15$, so it must be that