Jacqui,

I think you just need to play with the numbers.

How about

(6 × 5) - (10 × 3) + (7 - 4) or
[6 - [(10 + 5)/3] ] × (7 - 4)?

Penny

Let's start with something simpler:
a) Insert a math symbol between 0 and 3 to end up with 3.
b) Insert math symbols in 7, 3, 10 to end up with 0.
c) Insert math symbols in 4, 5, 6 to end up with 3.
d) Put it all together.

Actually if you were to do the proble from the start 7, 4, 3, 6, 5,10,
you'd try to break up the set 7, 4, 3, 6, 5,10 in smaller ``useful''
chunks as in b), c) above. It is like a jigsaw puzzle: sometimes they fit
the way you want, and sometimes they don't.

Claude