book Maths Puzzle Numerical Ability

statementsthat are accepted as true[ ].
statements thatare proven to be true[ ].

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book Other Question

How would you express this polynomial?
3xy^2(r + 3s) -6y^2(r + 3s)

Also what if it was setup like this, with -6xy^2, instead of -6y^2?
3xy^2(r + 3s) -6xy^2(r + 3s)

Thank You
TSJ If I hvae these numbers 10,11,12,13,14,15,16,17,and 18.I have to put them in a tic-tac-toe order. So that every way like up, down,across,and diagonal.They would have the same numbe