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Milk and milk products are good source of vitamin D & A
? , 864, 432, 144, 36, 7.2
45Â Â Â Â 45.5Â Â Â Â Â Â 47 Â Â Â Â Â Â 49.5Â Â Â Â Â Â 53 Â Â Â Â Â Â ?
...40   41    37   46    ?      55    19
...945, 1890, ?, 504, 144, 32
63, 74, ?, 129, 173, 228
What will come in place of the question mark (?) in the following series?
2.5, 6.5, 18.5, 54.5, 162.5, 486.5, ?
18, 54, 162, ?, 1458, 4374
50, 64, 80, 98, 118, ?
21, 28, 39, 52, ?, 88
728, 737, ?, 778, 814, 863Â