From the word 'ASTOUNDER', how many independent words can be made with-out changing the order of the letters and using each letter only once ?
Answer: B
Correct answer: 2
Keeping the letters of ASTOUNDER in order and using each only once, two words can be formed: AS from the first two letters, and UNDER from the last five.
The T and O between them are not used, which the question permits - the conditions are that order is preserved and no letter is used twice, not that every letter must appear. A third word would require reusing a letter or reordering.
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