In a row of some children, S is 25th from left, T is 60th from right. If they interchanged their positions, then T becomes 70th from right end.
How many numbers of persons between S and T.
10
11
9
12
8
0, 2, 8, 14, ?, 34
1, 4, 2, 8, 6, 24, 22, 88, ?
1, 4, 9, 16, 25, ?
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