How many meaningful English words can be formed using B, E, O and R using each letter only once in each word?
The correct answer is A
6 11 32 111 ? 2345 14100
3, 5, 12, 38, 154, ?
452, 369, ?, 217, 146, 79
290, 571, 900, ?, 1485, 1890
28, 43, 73, 118, ?, 253
72, 97, 147, ?, 322, 447
625, 125, 50, 30, 24, ?
226 231 466 ? 5606 28031
15, 31, 67, 131, ?, 375
7 29 61 ? 211 349
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