Given set:666, 633, 721
In all the numbers, 1st digit + 3rd digit – middle digit = 6 666 = 6 + 6 – 6 = 6 633 = 6 + 3 – 3 = 6 721 = 7 + 1 – 2 = 6 523 = 5 + 3 – 2 = 6
36 37 33 42 ? 51 15
-1, 5, 23, 59, ?
252, 128, 66, 35, 19.5, ?
4, 10, 19, 30, 43, ?
23, 39, 75, 139, ?, 383
72, 97, 147, ?, 322, 447
8, 12, 16, 22, ?, 64
69, 35.5, 39.5, 68.25, 152.5, ?
24 12 18 ? 157.5 708.75 3,898.125
10 11 12 20 24 ?
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