Multiply the inner numbers together to get the outer numbers. 6 4 12 8 2 3 8 4 3 5 6 2 3 4 7 5 2 5 3 1 6 10 9 8 2 3 9 9 8 8 10 5 2 5 6 7 6 3 6 7 4 7 10 2 8 3 10 7 8 7 4 5 3 9 8 9 10 2 9 9 2 5 6 6 6 1 Mathematics-3 78