Saturday Math Puzzle & Poetry

23 – 45 – 63 – 99450 -2 – 6 – 7

8 – 3 – 6 – 62400 – 33 – 29 – 42

11 – 12 – 13 – 54264 – 29 – 26 – 23

51 – 33 – 10 – ? – 9 – 8 – 7